I like to create playlists and mainly listen to my music thru playlists. It would be nice if I was going thru my music in Tracks view to be able to add a column that shows which playlist(s) each track is in, if any. Kind of like how we can add a column to see the bitrate of each track or the star rating. This would make it easier to tell which songs I do not have in a playlist yet.
It wouldn’t even necessarily have to list all the playlists it’s in, a simple “Yes, it’s in a playlist” or “No, it’s not in a playlist” kind of setting would help.