Wow are things that good now? It's been about a decade since I've played PC games. Linux support was not great back then. There were a few titles that worked well.
It's really quite good. When I browse the steam store I tend to just assume that anything with a windows flag will at least be functional.
If I'm purchasing a game that I plan to play exclusively on linux, I still tend to check proton DB before I click buy, but it's becoming more and more of an after-thought.
Proton support is scarily decent now, Linux daily driver is reasonably feasible even for games, though you might run into some grief with EAC if you play MP titles.
It's gotten pretty good the last couple years, and it's improving at a very fast pace. Some games work flawlessly on the Steam Deck, but don't yet work for me in Steam on my desktop running Arch, though.
