I just checked and this week I didn't even save a single song for example.
I guess it doesn't help that I do listen to really different types of music depending on what I'm doing. If I'm at home, I'm not listening to the same thing as if I'm at work (developer). When I'm reading, I'll also be listening to something different from normally. I wonder if that makes my discovery much more "basic", since it's a mix of pretty much everything.
Discover Weekly seems to have figured out that one of my most listened-to Daily Mixes is post-rock, so it only gives me that. I'm fine with that. I wish they would push the Daily Mixes and Discover Weekly more prominently in the app interface rather than giving me TOP 10 BRAZIL playlists when I open the app.
But honestly you can't beat just going to youtube for a live stream if you want some chillout-ambient music while you're programming. There's so many talented dj's out there culling new music.
This is difficult to measure of course, and is purely anecdotal. I am also wondering whether there is simply no more music out there that I enjoy, my music taste seems very obscure.
Music's a weird one. And taste changes. Last night I was listening to Jazz, I usually hate Jazz. Should it start recommending that to me now?
I can imagine what works brilliantly for some people will be abysmal for others (but I guess a decently advanced ML system should detect that and try different approaches for different people).
Although now that I think about it, one thing that seems to lead to wacky recommendations is sparse data. If I check out Japanese enka albums the "similar to this album" information has stuff like Justin Bieber, which mostly tells me they have so little data on what kind of listeners enjoy the music that it's pure noise.
I think curation is massively underrated - importantly, curation allows a filter on quality. Lots of popular music is popular for reasons other than its quality, and Spotify is unable to detect that. Critics can.