Desktop Linux is easily the least-stable OS I use with any regularity. It was my main OS from something like '01-'10, but after I finally gave OS X a try, and since Windows got its shit together some time late in the WinXP service pack cycle (or, arguably, Win2k, but that wouldn't run my games) and stopped crashing all the time, it's really hard to justify using desktop Linux.
Does the OS hard lock or completely crash? No... unless you have graphics drivers issues, which isn't unlikely. Then, oh man, yes, lots. X/Wayland crashes that restart the window server? Yep. Applications crashing pretty regularly or glitching out so badly they have to be restarted, including the basic applications distributed with the heavier DEs? Yep. And it turns out that your windowing environment crashing or the main program you're currently using crashing is really close to as bad as the whole machine blue-screening in Windows, from the perspective of the user. Using Linux makes me anxious, even though I very much know WTF I'm doing with it. MacOS and even (spits) Windows don't do that to me, any more. Now that I've experienced not feeling that way, I can't go back. I go years between work-lost crashes of any sort at all on MacOS. Linux, one month without such a thing would be miraculous.
If you build up from almost nothing and keep things very minimal and have very boring and stable old hardware, and do as much as possible from the command line, it can be kinda OK, but it's a lot of work to set something up like that, and ongoing effort every time you do something manually that'd be automatic or trivial on a more full-featured GUI desktop. If you start with something like Ubuntu or Fedora standard desktop installs, though, there's just too much that can go wrong, and it will, with some frequency.
I could tolerate some hardware or workflows not working and things generally being a little less convenient, maybe, if it were rock solid, but it's very far from that. The main problems seem to be that its entire graphics stack is incredibly fragile (Wayland doesn't seem to have done much, if anything, to fix that) and it's way too easy for a glitchy driver to screw up the whole system.