I’m 100% Linux on a 5950x and a 5700xt. I’ve had pretty much no trouble at all. The GPU works out of the box, and with the exception of enabling Proton for non-verified games, I’ve only ever had to click install and play. To be fair though, I only play single-player/non-competitive games, so I don’t worry about anticheat at all.
These days Windows games give me less grief on Linux than they ever did on Windows.