In the latest update (220.127.116.110) the notification number next to my playlists is gone. I follow a lot of playlists and checked every time when a playlist was updated and which tracks were added (blue dot). Please let me discover new music this way again!
We've discussed this idea and while it is interesting, we will be closing it. The reason for this is that quite some time has passed since its submission, however it hasn't gotten a similar amount of votes compared to other ideas. Because of this we cannot prioritize it at the moment.
If we do have any new information to share, rest assured we'll check back in here with a new status.
More info on why your idea has been closed can be found here.