Xorg is maintained... by Red Hat. As steponlego pointed out, they're already binning up chunks of the code base, but that's just preparing for when they shut the lights off entirely. As soon as Red Hat says "Shop's closed, boys, we won't be updating this code anymore" KDE and Qt will happily cut out their X support. Especially since Qt has for years been targeting mobile phones, car displays, and embedded applications as its business model -- markets where Wayland is at its greatest strength.
Yeah I know RedHat 'maintains' X11, this is part of the politicizing they do. Embrace, extinguish, they just forgot the extend part :)
RedHat and their business focus is a lot of what is wrong with Linux for users today. We don't make money for RedHat so their priorities aren't with us.
I'm hoping someone will still take it over for when happens. RedHat doesn't own X11. Wayland has its uses but there's a lot of niche and legacy usecases what will still need X11.
Probably your best hope is OpenBSD's Xenocara project, a fork of Xorg. If Xorg bitrots away and Red Hat won't touch it, some OpenBSD madlads are likely to step up... at least until Wayland gets running well on OpenBSD. :)
