Earlier quoted context omitted.
> 1) the old, mostly working thing is being abandoned in favor of Except that X11 is NOT "mostly working" for a significant amount of modern usages. Yes, if you happen to want to run your Terminal, Emacs, etc. remotely over a network connection, X11 is your huckleberry--but only because anything more complicated than a bitmap makes that a very difficult problem. If you want HiDPI, subpixel anti-aliasing, color calibr…
None of that require throwing away the entirety of Xorg/X11, breaking every existing application while expecting everyone to rewrite their code in a completely different way, breaking a ton of existing workflows (often without alternatives) and splitting the already tiny Linux desktop in half. Every single thing you've mentioned can be fixed with Xorg/X11. (except subpixel antialiasing because that already existed fo…
Then why hasn't it been fixed?
In open source, those who make the code get to make the decisions--for better or for worse.
My personal opinion as to why X11 gets so few contributors--the build system is so terrible that nobody wants to touch it anymore. I suspect they would get a lot more contributors if they changed to something like meson/ninja which doesn't need to recompile the universe to be correct.