No more physical games would probably push me toward a Linux gaming PC as the games would be cheaper and the system more polyvalent.
Still, I don’t want to have to go through a lot of settings to find a way to make the game run properly so I hope I’ll still see advantages in future consoles.
Only if you don't play current games. Booting up something from like 7 years ago? Sure it will run fine. Unoptimized AAA game released in 2024? You will be sweating and turning on every last performance boosting setting your card can manage.
I exclusively run Linux and I play modern games all the time without issues. You just click "install" on Steam and it works 99.9% of the time; I dont even look up the game to check if it works anymore. Also, have a look at some comparisons on YouTube — some games actually run faster on Linux because there's less bloat in the OS.
I play on a proper PC, not a steam deck. Of course there are going to be performance compromises on a portable device with an APU; that's got nothing to do with the OS.