No, I’m thinking of Xorg. The development on it has slowed to less than a crawl, and not because it’s feature-complete. It’s unmaintainable, and hell to manage for anyone that’s not a senior Xorg developer.
What features is it missing? They started decoupling GPU drivers from the X server a long time ago (about a decade), that’s why Linux has DRM, and what enabled making Wayland. At this point the only feature needed of Xorg, is a compatibility layer between X clients and Wayland.
Multi high and differing refresh rate HDR monitor setups require Windows or OSX to use to their full potential.
The ability to stop applications from keylogging you, secure and efficient screenshare, decent compositing, not to mention all of the cruft it’s obtained over the years that stops it from obtaining all of these. And, as a whole, Xorg is completely incompatible with multi-monitor setups - no fractional scaling, and no multi-monitor scales, as well as refresh rates as you mentioned.
All we should be using nowadays at most is Xwayland. You only get a pass for bare X if:
- You need accessibility tools that don’t work on Wayland yet: https://github.com/flatpak/xdg-desktop-portal/issues/1046
- You use some insanely old hardware that doesn’t support the appropriate in-kernel and userspace APIs for Wayland to function.
- You use NVIDIA, and can’t feasibly use Nouveau.
Otherwise, get the fuck off of Xorg. The ecosystem has matured enough such that Wayland Just Works for basically everyone.
X/X11/Xorg supports 48-bit color by default: https://linux.die.net/man/3/xcolor
The protocol is also framerate agnostic, other than having a V-sync option.
If you have a multi-monitor setup, with different characteristics for each monitor… well, the original X11 design was to have a separate terminal (computer) per monitor, with each terminal doing its own stuff to display an application’s image… so that’s why nowadayws we have Wayland as a middleware between drivers and X applications.
If the drivers and/or Wayland aren’t supporting some of Xorg’s features, that still leaves Xorg feature complete.