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I sure hope so. Wayland still doesn't support an important use case for me so it would suck if I couldn't use X11.

What is the use case ? :-)

Not OP, but for me the use case is Xmonad (window manager).

Wmonad ;-)

There's a project called "wmonad" on GitHub, but it's actually another X11 window manager, no relation to Wayland.

There was the Waymonad project, but AFAIK it was never usable and is now abandoned (last commit 4 years ago).