Users should be able to mass unfollow saved albums and saved artists.
The longer you have Spotify, the more likely you are to have many albums, EPs, and singles saved. And if Spotify insists on limits for Your Music/Library, then being able to quickly delete albums is a crucial feature.
It could function, by way of example, as personal image libraries do with an edit function where you can select each artist/album you'd like to remove from your library and then delete them en masse, rather than clicking endlessly through.
Image libraryMultiple images selectedMass delete function