Display “date first streamed” for artists and tracks in user comparison view

The comparison view of two users displays common artists, tracks, and more. Selecting each common artist or track discloses the count of streams and minutes streamed per user, in a head-to-head format (with figures of each user on each side of the screen).

It would be interesting to add the date each user first streamed the artist or track in the same head-to-head format. That would help friends answer the question “who heard of this artist first?” and be a fun prompt for discussion about the music.