the ability to add a cover for playlists would be an excellent addition to ListenBrainz, as it can get across the vibe of a playlist much better than a simple grid of release covers. we could even automatically generate a cover using the playlist name if we want (making a seperate ticket for that)
a few examples from other music programs attached, both streaming services and media players, including MusicBee, Spotify, Deezer, and BlackPlayer on Android