Due to the headline, it has dawned on me just now that the Steam Deck uses X11. Been using PCSX2 successfully on it for several months now. I never thought about whether it was using Wayland or X11 until reading this.
Ironically, the Wayland compositor used by the steam deck, gamescope, doesn't support native Wayland applications. Even weirder, it runs inside an X11 session.
To be fair, that includes a huge portion of the games available on a Steam Deck right now, given that Wine (and by extension Proton) currently only support running via XWayland. On the other hand, that's argument in favor of Wayland from my perspective; if something I want to run doesn't support Wayland, it doesn't actually stop me from using it.
