Comment by pjmlp

Until Valve starts shipping native SteamOS games, they were and are right.

Games are developed on Windows, using Windows APIs and development tools, and then Valve does the job studios don't see any value in spending development resources on, even though some of them use engines that also target GNU/Linux.

Talking about Linux gaming with Proton is no different than if Windows users would start talking about Windows being their favourite Linux distribution due to WSL 2.0.