Spotify?
What the heck is it doing in this list. When you pay Spotify - you are paying - supposedly for a large part - for Artists's right, not for a Software service.
Spotify is way better than similar offerings though, like Amazon or YouTube or Apple and such. Part of that is because their app makes social playlists easy. Everything from Christmas music to board game nights has a good community driven playlist.
But we can't even "bookmark" or save a position in a playlist. No way to place a pin in a playlist, go listen to something else, then come back to that playlist position. Major let down of Spotify playlists.
Also the mandatory syncing across devices is annoying. I sometimes listen on my PC, and don't want my phone to lose it's place where I paused it previously.
Also finding playlists by "humans" not algorithms seems deliberately blurred. Spotify wants to push certain content, so they've designed their service to make it unclear or unintuitive if you want to find playlists curated by people only.