Okay, I discovered navidrome this weekend and it's what i was looking for as a on-the-road solution so I migrated to it instantly.

But now, at home I use 3 raspberry-pi's (headless units, no X installed) with mpd which is controlled using mpc and/or home assistant. I like it, it's simple, convenient and super lightweight. a cronjob assures music is turned off in the evening, a script polls the joystick from the sensor-hat and a super tiny web gui, all relying on mpc.

Can I use navidrome as a music source instead of the current samba shares? It would reduce indexing of the nas down from 4 to 1 client.

Other ideas are welcome too.