To stop the same two companies from owning everything? YouTube Music and Apple Music are shameless anticompetitive moves, leveraging market dominance to move into other existing markets. (I'll afford more lenience to Apple Music, since iTunes was already huge, being the undisputed king of music sales before streaming subscriptions took off.)

I've also been using Spotify for longer than YouTube Music, or its predecessor that Google killed (as they do periodically) even exited.