I think raytracing is fine, as Vulkan on Linux is phenomenally good & active, is seemingly the go-to spot for Vulkan as a whole. Proton turned on raytracing support by default 9 months ago, and it's probably not flawless, but runs many flashy games like Cyberpunk 2077.
Valve's Wayland compositor is called gamescope, and gamescope has kind of forged some kind of path to make HDR work. And that relies on kernel patches that dont seem intended for upstreaming. It's all packaged and works great on Steam Deck. I have tried and tried to get the same stack working locally with a rx580 but no dice, can't get gamescope embedded to run, to much chagrin & sadness.
Wayland and Linux both have been on a long sojourn to make good protocols & implement HDR. It's finally coming together; KDE is shipping something. I don't know if GNOME and Wlroots have actually started work but there are tickets. https://wiki.archlinux.org/title/HDR_monitor_support
Valve had the resources to cut their own path, and it's kind of awesome & excellent. They've made a Cathedral atop Linux. I want to think that if Wayland wasn't so new in general, if there was more bandwidth & focus & not tons of other necessary big work in flight, HDR might have advanced at a much more respectable rate. But who knows. I think it's important to have appropriate expectations, and this slow walk does show a weakness of the Bazaar model of development that Wayland embodies. But I really want to hope it's for an excellent end result, that HDR has well considered development path by the time it's really in the wild.
