The day Linux says all video games are compatible with their OS is the day I finally switch from Windows for good.
I mean Wine and steamOS’s Proton are that though? Sure compatibility isn’t perfect but the vast majority of games I have tried worked all the way from current AAA games to games like Steel Panthers WinspWW2, a DOS game from the 90s that barely functions on a modern windows computer but yet runs perfect on my Deck. Because the deck is using a virtual environment to emulate a windows OS it actually arguably creates a more stable platform to run windows software than windows itself running the program normally.
Pretty much the only obstacle left is stupid super invasive anticheat/spyware software that doesn’t bother to cover Linux in competitive multiplayer games.