Yes, I’m playing unsupported and unverified games just fine too. Its the nature of progress, where the game, the drivers/system or Proton gets updated and the tested state no longer is accurate. There was a few cases when I tried the Windows version over Linux native build to see how it works. However I was never in a position where I needed that or when it was obviously much better. I always have this in mind in case I need to switch. Maybe in future versions where the native build is no longer functional under Linux.