It depends on what you mean by "work".
Discovery capabilities have certainly gotten vastly better. 10+ years ago, the only decent one was the now (effectively) defunct Last.fm. These days, they're all pretty good. Spotify, pandora, google music, and now youtube music will do a good job of giving you recommendations based strictly on what you've been cue-ing up.
But the recommendations from these services are the equivalent of going into a record store and getting advice from a dim-witted and disinterested employee. You'll get all the obvious stuff, maybe things you forgot about, and if you happen to like popular stuff the recommendations will work OK. But you won't get challenging, provocative recommendations that expand your taste. You'll get cloying recommendations that try to cater to your taste like it was a static attribute. Oh, yeah, and there's "the surveillance capitalism thing" which happens to be the centerpiece of all these services. Is that a problem? Yes.
The best "discovery algorithm" is still HUMAN BEINGS.
If your cool friends aren't available, then the next best thing is a mag like pitchfork (https://pitchfork.com/), xlr8r (https://xlr8r.com/) or in-depth reviews like Anthony Fantano's channel (https://www.youtube.com/user/theneedledrop).
