I've been Linux-only for something like 15 years, which is before Steam ever came to Linux. Over the past 5-ish years, my game selection has gone from "most games will work if I tinker" to "most games just work w/ no effort needed."

I've completed well over a hundred games on Linux, many of those AAA, "Windows-only" games, and I've played over a hundred more. The last time I had to do any kind of tinkering was for a janky old game, but most newer titles just work.

If you don't need games w/ anticheat, Steam on Linux works incredibly well.