> Funnily enough Valve tried to make Steam OS happen before Proton was a thing, for some reason they just expected games developers to port their games to Linux

> Funnily enough Valve tried to make Steam OS happen before Proton was a thing, for some reason they just expected games developers to port their games to Linux on their own dime. Proton is just a fork of Wine. Wine had already been around for decades, and there were other commercially-supported versions of Wine, like Cedega, long before Proton was around. On top of that, the increasing dominance of off-the-shelf game engines was already making it trivial to "port" games to Linux -- in Unity, for example, it's often just a few extra mouse clicks to produce a Linux build in parallel to your Windows build. So lots of game developers did start releasing native Linux versions, and continue to do so.