I agree with this sentiment and it feels right to me personally but I think to know how much consumption is changing we'd benefit from seeing this broken out by

I agree with this sentiment and it feels right to me personally but I think to know how much consumption is changing we'd benefit from seeing this broken out by age demographics. If the teens are listening to older music at the same rate as the late 30s/40s then that is certainly a problem for the music industry. Otherwise this might just be driven by the streaming adoption. We couldn't quantify this stuff before when everyone was listening to music on CDs, mp3s etc.