For one, people are not consuming music in the same way. They're not hearing things on a mass-syndicated radio network and then going out and buying albums based on what they and their friends like...they're quietly adding singles to their Spotify playlists. Their playlist is unique to them. To discover new music, one has to consciously seek it out. Whereas, in the past, it was prohibitive to carry more than a few records or cassettes along with you, people now carry more music in their pocket than they can listen to in a lifetime. So the discovery problem has dramatically changed. It's also harder for young artists to strike lightning and make a significant amount of money, so I think that impacts the amount of talent entering the scene.