How is rewriting Xorg to be very different from what it is now much different from writing Wayland from scratch? If you make it more like wayland it will break

How is rewriting Xorg to be very different from what it is now much different from writing Wayland from scratch? If you make it more like wayland it will break probably as much stuff. And rewriting can be harder than starting from a blank slate. Creating Wayland made it possible to do some very radical changes. When rewriting software you are much more careful to not break anything. Apart from that the discussion is pretty much settled. Most distros and major desktop environments have commited to wayland. You'd have to have a very compelling argument to move things back to Xorg.