I came to say this too. It was super easy to get sendspin working as a systemd service on my bazzite based jellyfin media player computers hooked to my tvs and it works decently well. If I can figure out how to get bazzite to output audio on one hdmi port and video on the other so I can split the audio to my speaker system even when the tv is off it would basically be perfect.

Once the esp32 based stuff matures and people start selling competitively priced enclosure/speaker/esp32 combos in the sonos play 1- play 5 style it's going to be amazing I think.