There was a while that I exclusively used apps where I could lower the bitrate of music I listened to. Because I'm not rocking crazy good headsets and such for when I needed it, and I really saw no reason to use up larger amounts of data when I was listening to music over the sound of a lawnmower walking around the yard for an hour. If I was going to leave music on and not have wifi, it just didn't seem worth it.

Also if you had poor bandwidth in an area, it plays better