> Their ssh supports the -X and -Y options to run remote X applications.

Cool, I remember using it in 2003 a few times. I highly doubt many people going to miss if those were gone. I would not be surprised if the majority of ssh server installations disable x11 session forwarding.

> Until then, get comfortable in a small and discardable minority.

Are you sure you're not confusing Wayland users with OpenBSD users?