Sure, it would be useful… if users used it. My guess is they don’t. Did you use the like/dislike buttons they tested on Spotify radio? I didn’t, too much effort. They probably get more signal from the skip button
Whats worse, there was a song that was constantly playing after my playlist ended. No matter how many times I marked the song as Dislike, it was always in first of 5 songs that play when playlist finished. Made sure the song appeared nowhere in my playlists (had to manually search in each), and neither did the artist. After contacting support and jumping trough few "restart app" styled suggestion, I was suggested to mark the artist as "never play this artist". This surprised me, as I never seen that option before. And then I understood why: its only in mobile version. You cant solve it on PC.
Bleh