No, you see a working system getting replaced with something that is in development and unnecessary for most use cases, unless you are willing to argue that web servers and render nodes need to be instant on devices, of course.
Hmm, sounds like every software/program out there that intends to replace some other software/program. Oh, you meant unstable/untested. Well, I'm sure they'll test it before pushing it on the masses; it is Xorg we're talking about, after all.
(...you shouldn't be using bleeding-edge Xorg releases in a production environment anyway)