

Emphasis on the protocol part. There is only 1 implementation of X11 (Xorg). Wayland however is just protocols. There are several implementations of varying quality.
Depending on your DE, you could be using one of Weston (reference impl), Mutter (GNOME), Kwin (Plasma), wlroots (hyprland, sway), etc.
Android started out as a framework for blackberry. So probably we’d all be using blackberries.