If you're using algorithms to discover music, you're doing it wrong. Music discovery requires far more context than any algorithm can give.
Appreciation of music is tied to location, events, time of your life, etc. No algorithm will ever have access to any of those elements.
Just because X song I like sounds a lot like Y song doesn't mean I'll like it. Especially if song Y has no other context to go with it.
Context is king. Context adds humanity. Without it, you're just a machine.