X11 was 21 years old when the Wayland folks decided it was obsolete and needed to be replaced.

Wayland is now about 18 years old. So, by Wayland standards, only 3 more years until it, too, will be obsolete and need to be replaced.

That day can't come soon enough. :D

Maybe the next one will actually be able to do the things I need a display system to do. Until then, at least we've still got X11. And Wayland has taught everyone all sorts of things about what not to do.