Interesting. I switched from Spotify to Apple Music. The "For You" section with curated playlists were way better than the Spotify playlists IMO. I only wish that I could choose an activity (workout, etc.) and/or mood and a genre and I'd be all set.
The Spotify equivalent of "For You" is where I'm having the most luck. Maybe I'll give Apple another go.
Funnily enough, it has recommended a lot of British Isles trad/folk to me, (and also Québécois, for some reason) most of which is OK but some of which is really interesting. It's found several long medieval ballads, which I would have thought was far too niche to recommend.