So I often go back a few playlists to see songs I liked then spend time listening to what other types of music I was listening to around that time. Perhaps around key times in my life. Or I think - "what was that song I loved that summer...." and spend ages finding it. Why now have a horizontal line that you could scroll left and right on that shows all songs you've interacted with. Like a history of your music on one line. Scroll letter back through your past songs and then back to you most recent choices. Like a little timeline.