Me too! I've been using Steam on Linux for a while, but thanks to American fuckery, I've had to experiment with leveraging Proton in Heroic to play GOG games. It's pretty smooth though. I installed Disco Elysium this morning and it Just Worked™. I then went ahead and bought a bunch of indie games: Dorfromantik, Frostpunk, and Terraformers in GOG's own Sumner sale. Not Canadian games mind you, but also not American ;-)
It's pretty good, but my problem is that if a game doesn't run I assume it's because I screwed something up. For example, Synergy, has a platinum rating and it installs just fine, but once started is just do slow for even drawing the starting menu while my CPU goes crazy. Clearly there's a problem with it not using my GPU, but fucked if I know what package I didn't install/configure properly.