This is also starting to happen with Podcasts (Spotify as the leading example).
But why hasn’t it happened for music, proper? I think Jay-Z’s Tidal tried this but they weren’t successful. But Sony Music Group, Universal Music Group, etc all have huge catalogs of music, and there is a trend of artists selling their catalogs to these companies. What’s to stop them from pulling back their licensing and launching their own app competing with Spotify? And conversely, why hasn’t Spotify moved into music production in the same way that it has moved into Podcasts? (Caveat being that they tried at some point with generic beats and piano and atmospheric music production, but those knockoffs felt flat and hidden - it wasn't promoted as Spotify original music in the same way Netflix or HBO content is).
Is it because licensing is much more distributed? (ownership primarily in artists' hands?)
This dates you favorably. Readers who were fully-formed adults when Netflix started out remember it as a clever hack around video rental stores.