@technomancy i mean... this bit is barely broken. anybody who doesn't need to swap button 3 for 8 on their mouse probably doesn't notice it, and it's only broken for the button-release, not the button-press, so it's not like nobody bothered to implement the feature
and my experience with pulseaudio and pipewire and systemd and wayland and printers and many other things that linux nerds go rabid about has been, if not positive, then at least continually improving 🤷