I think most Linux users (including me) are just cheap and don't even have hdr. One of my two monitors has a dent in frame and has one DVI port and power. I think a lot of the maintainers are similar and therefore don't prioritise problems they don't have yet.
I think it's a real shame how bad the Nvidia experience can be but at this point I've found that if the drivers from the arch repos don't work nicely the flatpak ones usually will. Wayland is of course still a problem for now but hopefully not for long.