Not only is nobody forking X but many people are building Wayland compositors.
Listening to the detractors, you get the impression that Wayland is a failure and / or that X may still be the better choice.
Then you realize the only people still working on X are paid by enterprise distros with long-term support obligations. All the toolkit people have moved to Wayland. The major desktop environments have shifted to Wayland. All the “new” window managers are for Wayland.
Wayland is already supported on BSD ( FreeBSD at least ).
The actual developers have spoken and Wayland has won.