I won’t claim that it’s all flawless, because it really isn’t sometimes, but a lot of things just work. Both new games, and old ones, that don’t even work on windows to begin with.
My biggest two showstoppers are games like Destiny, and VR titles, that unfortunately are completely unplayable because I own a Rift S.
I still play practically everything else on Linux, and don’t see any reason to not to. I already do everything else on this os, so why would I switch