Implying that switching is inevitable.
I'm not quite shore what the BSD people are planning. Do they plan on keeping a fork of Xorg or eventually trying to port Wayland to FreeBSD/OpenBSD/et. al.?
Finally unlike Python 2 vs 3 the difference between Xorg and Wayland is tremendous, so i can easily see people who will be willing to fork it to continue development.
No, it will not. Xwayland will likely be deprecated and removed in the coming years. The rationale being that nobody uses any Athena or Motif programs anymore and all of the toolkits that matter to modern desktops will have Wayland backends already.
Xwayland may kick around for really old apps but it will not be maintained at all and you will be expected to forward-port your software to Wayland.
But more likely, they will need to be run on some ancient OS or distro version and thus containerized or virtualized anyway.
Also since it got open sourced (properly), there are more people using Motif applications nowadays than 10 years ago. And there are other toolkits that target X outside of Athena and Motif.
And besides, "removed"? Removed from where? Xorg is just a historical name nowadays, what was called Xorg is a bunch of independent packages and the X server is a package by itself. The only way "removed" would apply here is removing the Wayland backend from the X server. Which isn't impossible, but after all the work that went into it, doesn't make sense.