[rchaud]

Nothing wrong w/ LDR at all, I was taking issue with Spotify's nudging behaviour like "Hey, millions are listening to these artists, why aren't you?", when my listening history would clearly indicate that I'm not interested in those artists.

Old-school sites like last.fm used user-submitted tags to link my listening history to new artists I'd probably enjoy. You don't need any fancy machine learning for this kind of basic pattern recognition. Spotify could obviously do this, but like Netflix, Amazon etc, they choose to push artists that make them the most money.