[com2kid]

That is Pandora's entire business model. They (used to?) have music majors review every track that came in on a bunch of criteria.

Sadly it never seemed to really scale and even to this day Pandora doesn't recommend the same broad swaths of music that Spotify does, but Pandora's recommendations tend to be more on point.

[Phanyxx]

There was a brief window when Pandora was available in Canada (long ago now), but I still remember how good their recommendations were. Nothing matches it even today