Fedora 41 plans to migrate the Anaconda installer to Wayland, remove X11 packages from GNOME, and reduce maintenance effort, following RHEL's decision to remove X.Org server.
It's a libre implementation of RDP. Regardless of who pioneered it, it's still open-source software, and Microsoft needs to keep RDP backwards compatible so it's unlikely they'll break it.
Worst case, FreeRDP can just go and do its own thing regardless of Microsoft