@owen I feel your pain. So many playlists I've nearly abandoned because the perfect songs aren't on Spotify. It is the most robust public service I've seen, but they are still missing a bunch of great stuff. Wendy Carlos. The second Buggles album. Ad infinitum.
@B Google music used to let you upload your own library to their service to fill in those gaps but Google killed the service because they want us to use youtube music which doesn't have that feature ☹️