Valve said they want to partner with companies to support it on other devices. Guess they haven’t taken up Valve’s offer for whatever reason. They should also have more faith on just how well proton works.
the problem is, supporting more than just 1 hardware spec is very difficult. im not just talking about their SOC, but the controller parts, the networking devices, all of the things that can be more temperamental on linux than it is on windows. and that’s without considering the long list of games that don’t work, and probably never will, for various reasons out of valves control.
Driver support is easier on Linux, and again I think you misunderstand how well Proton works.