The Apple Music recommendations have been pretty good for me, especially when auto-playing based on a song/playlist.
This is in stark contrast to Spotify, where after a while it would invariably throw in some songs that just did not fit in at all with the rest, and it made for a jarring experience. I've never really had that happen with Apple Music.
I’ve tried apples , agree it does less egregious stuff than Spotify but doesn’t really meet the bar for “good” in my experience. This stuff is probably really dependent on what you are looking for I imagine .
Spotify's algorithm has worked very well for me in the past.
I'm pretty sure it's not LLM based though, but rather domain specific, or possibly just a simple recommendation engine ("people who like x also often enjoy y").
As far as I can tell, the only thing actually any good at music recommendation is (some) humans.