I wonder how long it’ll be possible to build Gnome with Xorg support. If I had to guess I’d say there won’t be any support within the next 3 years, because keeping future Gnome working with Xorg is work nobody wants to put in.
That said, Xwayland will likely keep being around for the foreseeable future.
Out of curiosity, do you use Xorg and if yes, what’s keeping you from using Wayland?