That’s odd. I was just talking about how Spotify falls into the same cul du sacs that all similarity based recommendations fall in. Like it might show you some decent stuff for a few days if you give it a hard kick by finding something outside of Spotify first, but soon it’s the same three bands and two albums.
That has definitely not been my experience. The Made For Your section shows me tons of artists I've never heard from. I suppose it could be limited if you listen to a very specific niche where they don't have a large dataset on. I love finding new artists and then suddenly diving into a rabbit hole of discovering their older stuff.
Weird. As an anecdote my "Daily Mix 1" has 50 songs, and only two bands I didn't recognize. 62% of the songs are by artists with more than one song in the list. The most songs by an artist? 7 songs over 3 albums. Of the 50 songs, only 4 were put out this decade, only two bands did I not recognize.
"Daily Mix 2" is better with 30 bands, with the top band having 4 songs across 2 albums. Coincidently 62% of songs are also by artists with more than one song in the last, but the most common artist only has 4 songs across 2 albums. 19 unrecognized bands, so that's something.