I just realized there are now ~5 modern GTK streaming music player apps, but not a single good one for local libraries 🥲

Tidal:
https://flathub.org/apps/io.github.nokse22.high-tide
https://flathub.org/apps/dev.dergs.Tonearm

Jellyfin:
https://flathub.org/apps/io.m51.Gelly

MPD:
https://flathub.org/apps/de.wagnermartin.Plattenalbum
https://flathub.org/apps/io.github.htkhiem.Euphonica

Spotify:
https://flathub.org/apps/dev.diegovsky.Riff

Edit: Forgot Euphonica