Amusingly, I often hear this argument from Wayland proponents. Do they realize, that those very same developers have failed at maintaining Xorg code base and fixing it's bugs in backward compatible way?
To run a project into the ground and wash one's hands of it... is not worthy of endorsement.
This may be a matter of different perspective, but from my point of view the Xorg maintainers did a monumental work modularizing and cleaning up the codebase. They kept integrating modern extensions and have kept X11 relevant all this time. Try something pre-Xorg to compare.
But to run a project into the ground and not wash one's hands of it is an even worse endorsement.
You might not trust the Xorg devs to develop you a new window system, but at least you'd trust them to know if their own, existing code has fundamental problems.