Saturday, 3 October 2020

Apple made system calls horribly slow in the 10.14.6 update. Thank you, Apple!

After installing the Mac OS 10.14.6 update from the end of September 2020, I noticed something wasn't right. A simple Perl script that scanned a directory for all files and that invoked the stat system command for every file, had become way slower than before. I'm not sure if the same would have happened if it had relied on Perl's own stat() call, but this script needed the shell command because it can offer information that Perl's own stat couldn't provide.

Also when running a homebrew update, it seemed way slower than usual. It looks like Apple had messed something up w.r.t. system calls from within scripts, and perhaps other programs as well, although I didn't notice anything in regular apps. I knew this was likely to be reported by a gazillion developers and fixed soon, so I didn't bother. That horribly slow script of mine was annoying though, so I started seeing if it couldn't be improved.

The problem here was that the Perl script did the obvious thing of invoking a new instance of stat through backticks, for every single file it encountered. That's a lot of overhead. Until now the overhead wasn't bad enough for me to be sufficiently annoyed, but Apple's “update” had now pushed this way into the zone of bad words and gnashing teeth. The solution was pretty obvious: reduce the overhead by reducing the number of system commands. Luckily this could be done: the stat command does accept multiple files as argument, and returns the results as multiple lines in the same order as the arguments.

So, all I had to do was postpone the invocation of `stat` and build a queue of file paths, and execute the aggregated system command whenever it reached a certain size. In theory I could wait until the command line was about to exceed 262144 bytes (minus some margin to allow environment handling), which is the maximum system command length as reported by “getconf ARG_MAX.” In practice, I used a lower limit of 16 kBytes because above a certain threshold, the gain becomes pretty negligible anyway.

The result was that for a particular run, the script went from a 120 second runtime to 3 seconds. After Apple fixed the performance issue in a supplemental 10.14.6 update, the runtime became sub-second. So in the end I guess I should thank Apple for forcing me to refactor my script and making it way more efficient. Maybe every operating system should now and then introduce a temporary penalty on certain operations, or a limit on resources, just to force developers to be less lazy and actually improve their software instead of writing sloppy code and letting the machine just brute force it…

Thursday, 30 April 2020

Cosmic Frontier: Override, a remaster of Escape Velocity: Override

A year ago I posted how it is still possible to enter your registration code in EV Nova, by jumping through some hoops. If you want to play the previous instalment of Escape Velocity however, Escape Velocity: Override, maybe this will soon be possible again without any need for special magic, in a brand new reincarnation of the game.


A Kickstarter campaign has been launched to rebuild the EV: Override game engine for current operating systems. Due to legal reasons, the game will have a different name: Cosmic Frontier: Override. One of the persons on the team for this Kickstarter is Peter Cartwright, who was the scenario designer for the original EV Override game.

The remaster will feature the original scenario, augmented with new content like new ship types and new mission strings. Depending on your backer level, you can influence this extra content, like having your own starport bar or ship variant. At the time of this writing, the campaign is just beyond its 50% funding mark, with 19 days to go. I'd really like to see this succeed, so if you are a fan of games like Escape Velocity and you have about $10 (or more) to spare, head over to the Kickstarter page and make your contribution.

Monday, 13 April 2020

The Dreaded Butterfly Keyboard: trying to postpone the inevitable

In a nutshell: If you have an Apple MacBook Pro or other machine with the dreaded ‘butterfly’ keyboard and it starts to exhibit problems, you options are:

  • If you experience the problem of a certain key sometimes not reacting, try detaching the keycap (important: do not try this without first reading the “How to” section below for instructions). After looking—with a magnifying glass—for obvious dust, hairs, or crumbs and carefully removing any with precise tweezers, blast the mechanism with air from multiple directions, and reassemble the key.
  • If you experience the problem of a key producing multiple keystrokes per press, first do the above, and after reassembling the key, hit it many times as hard as you're comfortable with. Just type a piece of text like a madman, and there's a good chance that the key will behave afterwards.
  • If the above doesn't help, or problems occur too often, or you are not comfortable with taking the keys apart, and you have bought the machine less than 4 years ago, your better option is to go for the Keyboard Service Program.

The full story

A few years ago I was kind of forced to buy a new MacBook Pro, because my previous one, a 2011 model, had the dreaded GPU failure—another design flaw by Apple albeit lesser known than the keyboard debacle. Given the high price and the rumours about the bad keyboard, I seriously considered buying a Thinkpad or other PC laptop, but it looks like I am still too much locked into the Apple ecosystem to take that step. I hoped that the newer design with the extra silicone ‘flaps’ built into the keyboard, would make it reliable enough that it wouldn't develop problems in the situation where the MacBook Pro would be sitting 95% of its lifetime. But that was too much wishful thinking.

Even despite the fact that this laptop sits on a Griffin Elevator in a normal room with regular levels of dust, some keys did develop problems within less than one year. The down arrow key was first, it would sometimes miss a press. Then the same started happening with the Return key. I found a very useful page on iFixit Answers that showed how both thes keys were assembled, and this allowed me to detach them without destroying them. I then blasted the insides of the mechanism with air like crazy, and that has effectively remedied this problem.

A while later however, another problem started showing up: some keys, especially the ‘E,’ started producing double and sometimes even triple presses. The extra press would often come late enough that typing ‘bed’ could result in ‘bede.’ I again took off the ‘E’ key and inspected the internals, but all I found was a tiny hair that was only visible with a 10× magnifying glass. I gave the key the same treatment as the others, but it kept on exhibiting the multiple keystrokes problem.

It seems to me that this key repeating problem is not caused by dust particles. It rather looks like the contacts become unreliable, maybe due to an oxide layer forming on them? The keyboard can become pretty hot when the machine is under heavy load during an extended period, like when running a modern game. Maybe this degrades the contact surfaces? This theory is further corroborated by the fact that I eventually did manage to make this problem go away, by simply punching the key much harder than usual. Percussive maintenance does work, even on delicate modern machines…

The good news is, after a class-action lawsuit, Apple has started a repair program that allows to bring in your machine if it obviously exhibits these problems with the keyboard. They will then replace the keyboard, which usually means replacing the whole top assembly. As explained in this video by Louis Rossmann, theoretically it is possible to replace only the keyboard, but only with very specialised tools because the thing is actually riveted into the case and in many machines you need to detach the glued-in batteries without rupturing them and setting your workshop on fire.

And by the way, I fully agree with Rossman that I expected a machine this expensive to at least be as reliable as a much cheaper one with similar specs, and also much more serviceable. Where are the days when Macs were modular machines that could be entirely taken apart without even needing a screwdriver?

Even though the repair program is free, the downside of course is that you will have to do without your computer for a few weeks. So if you are only having mild problems with the keyboard, it may be a better option to first try to remedy it yourself, but only if you feel confident enough that you won't make things worse.

How to detach the keycaps without destroying them

If you want to have an attempt at detaching the keycaps yourself, BE VERY CAREFUL. Do not simply yank on the caps from any direction, or you will break little hooks and the cap will be forever loose. The trick is to slide a thin piece of plastic in between the cap and the butterfly mechanism (see SHOVE in the pictures below). Do not go too deep, try to keep the plastic as horizontal as possible to ensure it does not go under the butterfly hinges themselves. Then shift the plastic towards the clips (called slide in the pictures) to detach them. For most of the regular keys, the cap is attached with two clips at its top end, and two hooks at the bottom. For these keycaps, start the SHOVE in the middle of the left and/or right edge, as indicated with the arrows in the photo below, then slide upwards. Once one of the clips is detached, you can usually keep sliding across the upper zone of the cap to detach the other clip as well.

A piece of cut-up blister packaging works well for this purpose, but a thin guitar pick (plectrum) should also work well. The longer keys like backspace will typically have 3 clips instead of 2.


For other keys, the procedure differs only in the place where you have to shove the pick and in which direction you should then slide it. For the ‘up’ arrow key, the clips are at the right. For the ‘down’ key, the clips are at the left. For the tall European style of Return key, the clips are at the left, and there are 3 of them. I have borrowed the photos from the iFixit page to illustrate this. Note how the whole mechanism of the return key has been detached in this photo, this is not how it is supposed to be.


To reassemble, slide the hooks back in their place, then re-engage the clips by pressing on the zone where they reside.

The space bar is notoriously difficult. If you feel you need to take it apart, consider going for the Apple repair program instead. If you break things, you won't be able to benefit from the free repair.

And of course, the usefulness of the repair program is very debatable. The replaced keyboard will suffer from the same flaws. I wish there would be a replacement program where I could exchange my inherently flawed MacBook Pro for a considerable rebate on a late 2019 MacBook Pro with its reliable scissor keyboard.

A final piece of advice

If it isn't already obvious: never do anything in the vicinity of your butterfly keyboard equipped machine, that could cause any small particles to fly around. Or, cover the keyboard with a sheet of paper if there is any such risk.

Recently, the backspace key started acting up. Something had obviously got inside the mechanism, but with the naked eye I couldn't see anything suspicious. Even after repeated sessions of removing the key cap and blowing air, it kept feeling strange and sometimes did not respond to presses. I then took a flashlight and magnifying glass, and finally saw that some tiny piece of something had got under the mechanism. It was a pain to remove because Apple's silicone flaps that were supposed to keep junk from getting inside, now made it hard to get the junk out. I eventually managed it with extra fine tweezers, and it proved to be a tiny piece of clipped fingernail any other keyboard wouldn't care about. So, don't clip your fingernails in the vicinity of the keyboard…

Friday, 10 April 2020

True Tone display abruptly changing tint? Try not covering the sensor!

On various forums, one can find complaints about the True Tone display of the more recent MacBook Pro models suddenly changing tint, or the intensity of the screen flickering. Some of those forums will tell you to disable the True Tone or Night Shift feature. If you don't care about those features, it's an effective workaround, but it is kind of stupid to buy a machine with all these advanced features and then disabling them.

I have also experienced this, and found no rhyme or reason behind it—until now.
I'm pretty sure there are some other causes for this problem, including hardware or software faults, but before you go bringing your MacBook Pro to a service center, you might want to check the following first.

Many people cover the camera built into laptop screens with a sticker or something else, for reasons of privacy and/or security. The problem is that the True Tone sensor is very close to the camera. If your sticker is large enough, it will partially or fully cover the sensor. Even if that's not the case, maybe you often do use the camera, and then have to park the sticker somewhere, and a convenient place is right next to the camera—possibly right on top of the sensor.

When covered, the sensor will receive much less light than it should, possibly filtered in some strange way, and this can cause the True Tone system to react wildly to tiny changes in ambient light. I still don't understand why the adaptation algorithm allows such quick changes at all, but one can't really blame the system for starting to act weirdly in a very poorly conditioned situation.


The sensor is very hard to see, which is why most people are unaware that it exists at all, let alone avoid covering it. On my MacBook Pro model (2018 15 inch), the sensor proves to be at 17 mm to the right of the (more visible) camera, as can be seen by shining a strong flashlight across it. You may want to verify on you particular machine where the sensor really is situated.

So the morale of this story is: if you have any thingamajig that covers the camera, make sure it stays well away from the sensor. If you then still have strange variations in the tint of the display, then you may start worrying about a deeper problem. As a matter of fact, in my case the problem still occurs occasionally. It looks like the sensor gets confused in situations where there is little light, or rather weak light coming from a direction mostly parallel with the screen surface. What usually helps in such cases, is to provide a stable source of light closer to the computer, so just turn on a lamp.

Saturday, 21 March 2020

Calibrating a cheap digital Chinese hygrometer

This article describes an attempt to calibrate a digital hygrometer even if it has no provisions for calibration at all. This was mostly an experiment. Don't expect miracles from this method, but it may be used to keep the hygrometer readout pretty reliable around the point where it will normally be used.

Introduction

Very cheap combined digital thermometer and hygrometer units can be bought from the usual Chinese marketplaces. The thermometer part of these things is usually reasonably accurate, but the hygrometer part is a game of roulette. A proper hygrometer should have a calibration button or button combo that has to be pressed after leaving the unit in an enclosed space with a saturated salt solution, which will stabilise at 75% RH after many hours. These cheap things however rarely have such button.



In the hopes that the device shown in the above photo would have some secret button combo to reset the measurement to 75%, I have tried inserting the battery while holding down buttons in various combinations, or mashing the buttons while the unit was already on, but without any success. I doubt whether devices like this contain any EEPROM at all, the measurement tables are probably hard-coded in ROM, and it is assumed that the humidity sensor will be accurate enough.

Hence the only way to correct the read-out, is to modify the signal coming from the sensor itself. There are two possible approaches:
  1. Add resistors to either increase or reduce the electrical impedance of the sensor. This is probably a bad idea however, because it will change the slope of the humidity response curve. The meter will only be correct around a very limited set point, and deviate increasingly when moving away from this set point. It would take some fancy op-amp circuitry to truly shift the impedance curve without altering its slope, and this is way too much effort for a cheap device like this: just buy a better unit for the money that would go into buying parts and spending time on building this circuit!
  2. Physically alter the sensor itself. These sensors are simple: it is a substrate sandwiched between two metal plates, or with two intertwined grids of metal ‘fingers’ at one side. The substrate contains some mildly hygroscopic material that will absorb moisture from the air, and the more humid the substrate, the better it conducts electricity and the lower the impedance. Therefore if we can alter the degree to which the substrate wants to absorb water, we can shift the impedance value. I'm not sure whether this won't also alter the slope of the impedance curve, but from my initial tests this seems pretty OK.
Therefore I have tried solution 2 with reasonable success. While in theory you could use the saturated salt solution to check the correctness of your adjustments at 75% RH, it is much easier and faster to rely on a true calibrated hygrometer and compare with its readout in whatever environment you please.


The method

There are two possibilities:
  • The readout is too low, meaning the sensor is not hygroscopic enough. This is the easier scenario. We need to add a bit of hygroscopic substance to the sensor to remedy this. I have found that hand sanitiser gel works well. The reasoning behind this is that these gels will always contain some substance that attracts water because otherwise the alcohol in the gel would dehydrate your skin. Typically it will be glycerine (glycerol) but it doesn't really matter what exact substance it is. The concentration will also be very low in these gels, which makes it easier to make small adjustments. Start out with a very small amount of gel and apply it at a single spot on the sensor. On the ‘sandwich’ type sensor, applying it to the edges has the most effect. For the ‘fingers’ type sensor, use the tip of a toothpick to apply just a tiny line across the metal fingers. Then leave the sensor to dry for several hours and see how the read-out settles. As long as it hasn't come close enough to the actual humidity value, repeat the procedure, if need be with increasingly small amounts of gel and at other spots on the sensor. Avoid overshooting the required amount, because it is harder to bring down the read-out again than to bring it up. If you did overdo it, use the following instructions to correct it. If it proves too hard to apply sufficiently small doses of the gel, it could help to further dilute it with distilled water.
  • The readout is too high, meaning the sensor is too hygroscopic. This is harder because you need to remove some of the hygroscopic substance from the sensor. Things that can work, is rubbing the sensor with a tissue soaked in distilled water to draw out a bit of the hygroscopic substance, or physically scraping a bit of material off the sides (avoid damaging the metal parts). Again, if you overdo this, go back to the previous instructions to raise the value again.
Regardless of which of these two adjustments you made, allow at least 3 hours for the sensor to settle before checking the value. If you soaked the sensor with water, it can take even longer. In that case you could put the device in a bag with silica gel to speed up the drying process. This is obviously not a fast process but the actual time spent on making the adjustments is small, most of the time goes into waiting for the sensor to stabilise.

Success of this method proved ho-hum. A hygrometer on which I had to apply quite a bit of extra hand sanitizer, gave OK values the first few months after trying this hack, but it started deviating more and more afterwards. When inspecing the sensor, it seemed as if the substance I had added had started degrading in some way. So if you need to apply more than just a hint of extra substance, you can pretty much forget about it remaining accurate.
Even if you can perfectly nail the calibration to 1% accuracy, of course you still shouldn't trust these things to be reliable. Also don't try to use these simple hygrometers in environments where relative humidity get near to 100%, because in extreme cases, a drop of water may form on the sensor and mess up the calibration. Just buy a good hygrometer that can be calibrated if accuracy and reliability is important.

Wednesday, 26 February 2020

Get rid of the bottom toolbar in Google Chrome on Android

In a recent update, Chrome on Android introduced a change that caused the previously experimental ‘duet’ feature to be enabled by default. This places an additional toolbar at the bottom of the screen with buttons for new tab, search, and share. This bar is supposed to disappear at the same time when the top toolbar disappears (typically when scrolling down), but on my phone this was often not the case, especially on pages that are not long enough to allow scrolling. Worse, the bottom part of such pages could then become permanently obscured by the toolbar, pretty damn annoying.

It does make sense to place controls at the bottom because this makes them usable with one's thumbs, but then everything should be put at the bottom, not both at the top and bottom! Because the latter is currently impossible in Chrome however (as far as I know), the best you can do to avoid the possible nuisances of this bottom toolbar, is to disable it.

This used to be controlled by a single setting called “Chrome Duet” in the chrome flags. Now however, there seems to be a new one called “Duet TabStrip Integration” that also enables this feature. It is unclear how these interact.

To completely disable the bar, enter “chrome://flags” in the address bar, and then enter “Duet” in the Search flags box. Set both “Chrome Duet” and “Duet TabStrip Integration” to “Disabled”. Then restart Chrome. If the bar is still present, toggle the flags back to “Enabled” and then “Disabled,” and restart Chrome yet again. Keep repeating this dance and eventually it will work.

I'm inclined to try another browser but unfortunately Google managed to lock me into their ecosystem because I use Chrome on other devices and it is pretty handy to have everything synchronised, like bookmarks. If they keep annoying me with unexpected changes like these however, I may just become motivated enough to migrate all devices to another browser.

Thursday, 19 December 2019

The State of Thingiverse, End of 2019

In June 2016, I bought a 3D printer on a whim, I only had one real concrete idea for something useful to print. But no worries, because there proved to be a website containing a few millions of free 3D models. Granted, the vast majority of models posted on it proved to be useless junk, but some were either very cool or truly useful. That site was Thingiverse. It was, and still is, the de facto standard for 3D printable model sharing. At that time, the site worked pretty well and had a very active and mostly friendly community. Questions would most often be replied to with useful advice, and if there was a problem with the website, there would at least be an acknowledgement even if the problem was not soon fixed.

The Good

Thingiverse used to be one of the main things that kept feeding my interest in 3D printing. Not just because of the new models coming in every few minutes, but also because of the community, and because it was pretty easy to share my own models, many of which started out as improvements upon someone else's. I am now the co-author of the “Flexi Rex with stronger links,” one of the models a present-day buyer of a new 3D printer seems likely to print as one of their very first attempts. I never anticipated this, I only improved upon an existing model because it broke way too soon when my grandson was playing with it. This is what I like about this community, one can easily take an existing model and improve it, and share this improvement for everyone to enjoy.


The Bad

Today however, things have changed for the worse. The turning point was somewhere in 2017, when one of the main moderators of the website, called ‘glitchpudding’, suddenly left. After this, it became much harder to get any response from whomever was responsible for maintaining the site. At the increasingly rare times that there was some kind of announcement, it was from a different person I had never heard of before, as if the previous one had been fired. This would not have been that bad if the website would have maintained its same quality level, but it had not. All kinds of annoying issues started popping up, like the website becoming very slow at times or throwing 500, 501, 502, … HTTP errors at random moments.
Complaining about this seemed to be of no use, because only rarely would there be a response from what might either be a Thingiverse employee or maybe just some random joker — there was no way to verify that whoever was replying on the discussion forums, was an actual Thingiverse / Makerbot employee, it was often a different username, more often without than with the “Thingiverse” badge.

Then it got worse: apparently the nearly invisible Oompa-loompas now running the site, were trying to make certain changes for… reasons. One can only guess when something has changed, because there is barely any communication when this happens. The most obvious sign of a change is an increase in the number of issues. Suddenly all photo previews were broken. Then suddenly they worked again, but any photo that was not in a 4:3 aspect ratio, would be shown distorted. This was not the case before: photos used to be letterboxed and/or cropped in reasonable ways. What was the point of this change? It only made the user experience worse.
Now at the end of 2019, there are finally some advance warnings or notifications that some issue is being worked on. For instance in December there was a site-wide banner telling that there would be “maintenance”. One would expect that this maintenance was aimed at improving the state of the website, but instead when it had ended, we had an extra HTTP error in the 500 range and random 404 errors as well, even on the main page. A website gives a very bad impression if its main page throws a 404 error.

Overall the website in its current state gives a strong impression of lack of professionalism, sometimes downright amateurism. It seems that whoever is maintaining it, does no more effort in testing their changes than trying something once and then assuming it will always work. I wonder if they have a testing environment at all. Often it feels as if they make changes to the production servers directly. The changes give an impression of lack of skill in developing a modern cloud-based website, rather it looks like trendy hipster frameworks are just being thrown on top of a rickety organically grown base without much vision. I am not saying the (obviously few) developers working on the site are amateurs, but the end result does give that kind of impression. It is likely this is merely because management does not allow the developers to spend enough time to implement things properly, so they are forced to only quickly hack things together.

These are all ‘feelings’ and ‘impressions’ due to the total lack of communication. Only from the recent 504 error pages I could see for instance that they had either thrown ‘openresty’ into the mix, or had already been using it but had now broken something about it. There has been no announcement for this or an explanation why.

I have created my own issue tracker on GitHub just to make all the most obvious problems with the website more visible, in the hopes that this would help the maintainers to decide what to fix next, but it seems to be completely ignored.

The Ugly: my guess at what is going on here

In case you didn't already know, Thingiverse is owned by Makerbot and since 2013, Makerbot is a subsidiary of Stratasys, a company that already marketed 3D printers way before the big 3D printer boom started around the year 2010. Makerbot has changed from a small company selling affordable open source printers, to a big company selling rather expensive walled-garden machines aimed at the education market. I guess most of the original enthusiastic team wanting to change the world (like glitchpudding) have either been fired and replaced by people only interested in milking profits from whatever looks vaguely promising without actually caring about it, or they have transformed into such people themselves.

Thingiverse was part of the original vision of making 3D printing affordable for the home user, a vision that does not really fit with Stratasys, the company selling industrial machines at industrial prices. I guess that at every moment since 2013 when a decision about Thingiverse had to be made, the decision has been biased towards gradually sunsetting the website. Nobody at those companies seems to understand the value of this huge playground that encourages anyone to buy, experiment with, and get familiar with 3D printers. It doesn't matter that no beginner will immediately buy a horribly expensive Makerbot or Stratasys printer: the mere fact that there is a low threshold to gain experience with 3D printers, will increase the chance that these same tinkerers will later on generate profits for those companies. That however is probably way too much thinking-ahead for the average marketeer who has been brainwashed to always take greedy short-term decisions and lodge themselves into a cozy local optimum.


What Really Is Going On

Shortly after writing this article, someone notified me about this blog post: https://xyzdims.com/2019/11/21/misc-formnext-2019-aka-just-too-much-for-one-day/
It contains a part about Makerbot's presence on the Formnext 2019 exhibition. The author had the chance to talk to Jason Chan, who is responsible for Thingiverse. Many of my suspicions are confirmed: only two developers are assigned to the site (and I guess only part-time), and the company greatly underestimates the importance of Thingiverse. There seems to be some commitment to improve it, but again it looks as if the ones holding the bag of money do not share this commitment… Still no concrete indication of what will actually happen to the site.


“But it's free!”

Every time someone posts a complaint about the broken state of the website on the Thingiverse Group forums, there will be replies in the vein of: “but it is free, you have no right to complain.” I disagree. There is no such thing as a free lunch. Everyone who uploads content to the website, somehow invests in it. Some more than others, depending on how much effort they put in crafting the presentation and documentation of their Things. I have invested quite a lot, with about 120 published Things, each with pictures and an extended description. What I am now getting in return, is a pile of issues that make it harder to upload and edit Things, and I have no idea where the site is heading because of the lack of communication from the part of the maintainers. This lack of communication and lack of care to properly test each change, feels very disrespectful, even though only in an indirect manner. It almost makes me feel like an idiot for having put all this effort in my uploads during the years I have been on the site.

There are a few particular users on the Thingiverse groups who will react religiously against any complaint, one of whom has a pretty apt username given his writing style, which makes it seem as if he is drunk (he probably just is). Ignore them, because they are either trolls feeding on the anger, Makerbot employees paid to hold a denial campaign, idiots, or all of the above. None of them upload much of anything, therefore they don't even have any ground to stand on with their claims that the site works perfectly fine.

The content creators are the only reason of existence for Thingiverse. These creators deserve a little more respect than being ignored and being handed increasingly cumbersome tools to upload their content, without any explanation of what is being changed about the website, when, and why. There is no excuse for such poor communication in this era with so many different digital communication methods (and no, Twitter is not really a good communication method). I know it can be done better, because I was pretty content with how the site was maintained and how changes were communicated when I joined it in 2016. I have the feeling that the main breaking point for the website, was when the aforementioned glitchpudding left somewhere in 2017. It seems to have gone downhill ever since. I am not the one who demands infinite progress in everything, but I do expect that when something is good, people do the effort to keep it good.

Solutions, alternatives?

Obviously any sane person witnessing such evolutions on a certain website, would start looking for an alternative. That however proves to be a big problem with Thingiverse: there is no real alternative. I have looked at some other sites, but Thingiverse's biggest trump card is its sheer library of things. No other site comes close to it, therefore it doesn't matter if Makerbot only keeps Thingiverse at a level where it is just usable enough, people will keep coming for the content.

YouMagine looks decent at a first glance: its interface is the most similar to Thingiverse's I have found so far. It is owned by Ultimaker, alhough this is not explicitly mentioned on the site's main page. After trying it out however, it is obvious that YouMagine suffers from the same lack of maintenance, or worse. The ‘blog’ part has not been updated in ages, the featured things remain the same for a very long time, and reporting spam is impossible because the ‘report’ link only points to a dead support e-mail address. The 3D model previews and the ‘assembled view’ feature are mostly broken. Links and bold text do not work in the description text, which is incredibly annoying (I can imagine that they disabled links due to the spam, but bold text: why?!)
The site still runs, but it looks like a ghost ship. Maybe the only good thing about this is that if nobody changes anything about it, they also cannot break anything about it…

There are other sites like MyMiniFactory, against which I have grown an aversion due to the apparent shills promoting it on Thingiverse groups as the best thing since sliced bread. There is also Cults3D but just as with MMF, I find that there is too much emphasis on hiding content behind a paywall.

I have no concrete ideas for a solution. The best thing would be if a new website would be constructed by a community that does care about it, not tied to one particular manufacturer, and with a strategy to keep the community and website alive in the long term. Ideally, somehow the Thingiverse library would then be migrated to this site, but that is optional. I have made backups of all my uploaded models and their descriptions and photos, and I will happily re-upload them to a new website that is worth it. Maybe it would be better this way because to be honest, I estimate 80% of all Thingiverse models to be junk that would better be garbage collected. Starting from a clean slate might be better…