As someone who ran into Spotify's song limit quite quickly when I attempted to transfer my collection over from iTunes/Apple Music, it's really not a service I would recommend to album-oriented people who have a lot of different artists they listen to.
I also prefer Apple Music because it lives in iTunes, where I also have my podcasts and radio stations stored, as well as albums that aren't available through either service (of which, I have many, since neither service has a very good selection of videogame OST's 🙁 ). The Spotify application does an appalling job of handling locally-stored music collections in my opinion, and they have only just recently started to add a smattering of podcasts to their service.
All of that being said, Spotify is probably perfectly fine for the vast majority of listeners out there, and their music-discovery features are on par with, if not better than, those on offer in Apple Music.