[michaelmrose]

I think securing X would reasonably be viewed as a non starter for those who intend to replace X with wayland.

[the_why_of_y]

In the sense that Wayland is what the X.org maintainers came up with as the solution to X11's security design flaws. (There was a previous attempt in XACE, which essentially extended SELinux's security model into the X server, but somehow that never caught on.)