I had to move my system to a new SSD with more space, mostly because the great Python venv system makes it that each project takes up between 5Go and 30Go of disk space, so having 224Go was not enough anymore. Nvidia driver didn't install properly so second reboot was to a black screen. Thankfully after some fiddling with packages it worked again. Then the old ways I loaded up ssh-agent didn't work anymore, so it took a few logouts to find a new one. I tried to recompile my CV, but somehow Latex dependencies all changed names, so I had to track down missing packages. Then it still would not compile because the names of the fonts had changed. Configuring the font line was frustrating as xelatex and pdflatex did not expect the same line, and both crashed on a different error that did not lead to an easy solution. When I tried some game on Steam, it just crashed without an explanation. After checking ways to boot it from the CLI -- which is unsupported but search results lead to partial solutions to that problem anyway -- I found that it was possible to add a DEBUGGING argument to the proton command. Searching the error lead to simply find that some lib was missing (actually the challenge was in finding the proper error to search for). I'm the most amazed at this one since this is not in any way "developer software", but a standard user one, for which at least 1 hour of pain would have been removed by an optional dependency.

I'm cutting down the list but it took days to solve every single broken thing.

By coincidence I watched "how to prevent the collapse of civilization" by Johnathan Blow. His point that nobody is surprised anymore that everything breaks and is bugged, it has become the baseline expectation.