X is no more standard than Wayland at this point. While many distributions still use X by default, it is in maintenance mode, and on it's way out.

https://discourse.ubuntu.com/t/trying-wayland-by-default-aga...

https://fedoraproject.org/wiki/Changes/WaylandByDefault

It seems reasonable to expect that these two distro's are the main ones in use by people who don't know enough to pick for themselves.