I haven't been able to make the switch for a couple of reasons:
- Spotify Discovery weekly playlists are a differentiator and nothing on Apple Music comes close.
- Apple's UI was terrible, maybe this has gotten better - but it was really bad. Spotify isn't great here either and often changes things for no reason. I'm not sure why it's so hard to just be able to add songs to a library and then make playlists? Spotify's current UI has this now, but didn't have it for a long time.
- There are apps that allow you to sync your Spotify lists to apple music to make it easier to migrate over, but there would often be stuff missing.
- iTunes was bad, but since that's gone now it might no longer be a problem.