I’ve been running it for over 10 years now across a few different PCs and stability-wise has been a mixed bag for me.
First PC was unsurprisingly flaky. Nvidia optimus laptop where the optimus drivers were still being figured out for linux. So I was running the testing repo to get SOME semblance of usability. Plus a whole host of other issues.
Second PC was perfect, never had a single issue with stability the 7 or 8 years i used it. Still functions, but the graphics card was starting to struggle in games. So now it sits silent.
Latest one was perfect for a few years, but in the last few months has been getting weird. Some graphics driver/kernel issues (known bugs, now resolved). Plus other weirdness I thought was related but isn’t. Some applications just wouldn’t launch, or launched if I started them immediately after logging in, but not if i did anything else first. The plasma 6 update messed up a lot of stuff for me too. So just yesterday I reinstalled Arch to another SSD and symlinked some stuff and that has solved most of my issues. The thing is, it’s a bleeding edge rolling release distro. Sometimes things do break for me, but most of the time it’s fixed a few days later. What happened to me recently hasn’t been an issue since the old crappy laptop, and I am running a LOT of stuff from the AUR. So to summarise my essay, generally pretty stable lol.