I went fulltime Linux and therefor bought a full AMD system (better drivers) one year ago. I played about 15 games the last year, some of them AAA titles, rarely had problems, and all of them could be fixed by looking on protondb.com (unless the problems came from the game itself of course).

There are some titles which will not support Linux on purpose although it surely would run just fine, for whatever reasons, e.g. fortnite.