It was fun to go back through the collection of music I've been accumulating since high school and moving from hard drive to hard drive: mostly ripped off CDs from the library or purchased in used bookstores, later purchased from iTunes, Amazon, and BandCamp once DRM-free downloads became the norm. Updating album art and re-curating the collection has been a walk down memory lane --- I'd (back then) embedded most of it at 200x200 to fit on a tiny Sony MP3 player, and then an iPod, without wasting space. The music library holds up better than either my old DVDs or the rips I made of them... Even lossy MP3s don't sound as rough as 480p looks on a large display today.
If you're looking to update the metadata in your own music collection, I can happily recommend:
* https://covers.musichoarders.xyz/ for searching for album art.
* https://picard.musicbrainz.org/ for editing music metadata in files.
If you're wanting to replace Spotify or other music subscription services on the go (i.e. from a phone) with something like Jellyfin, Funkwhale, or Navidrome running at home, I've tried and had some success with both tailscale and netbird (though these both require some networking knowledge).