When was the last time you had the thrill of discovering a brand new song from a brand new artist, and it made you feel the way you did hearing Midnight Oil for the first time? Or Kylie Minogue. Or the Beastie Boys. 

New research shows a dramatic decline in sales of new music over the last 20 years, and it's creating a nostalgia-spiral that could mean even when you want to find new music it all sounds the same.