Even gamers nexus' Steve today said that they're about to start doing Linux games performance testing soon. It's happening, y'all, the year of the Linux desktop is upon us. ᕕ(ᐛ)ᕗ
Edit: just wanted to clarify that Steve from GN didn't precisely say they're starting to test soon, he said they will start WHEN the steam OS releases and is adopted. Sorry about that.
Probably true, it depends. There are Steam folks and then there are GOG folks.
I prefer GOG tbh because it's DRM free, but for some games I still need Steam, unfortunately.