>In my experience, running X11 over a network worked very poorly.
Well in my experience, running X11 applications using network transparency works perfectly fine. It can be a life saver when your server is a proprietary UNIX, these are still in many Fortune 500 companies.
I have/still use network transparency as: Linux/BSDs <-> BSDs/Linux and Linux <-> AIX.
I even ran a few (Xlib/Motif) applications as "Linux <-> Linux <-> AIX" where the middle Linux was a pass through server without any issues.
So, No issues with network transparency, that is why I will avoid Wayland as long as I can.
To the article, Wayland on OpenBSD looks like a very extremely project, wish you luck.