I think its the attention deficit thing with todays audiences. Jazz, Classical and even some Blues are music that need your full attention to appreciate fully whats going on. Also the aspect of the musical knowledge base of the listeners. The more you know about a particular style. piece, or artist the more you can listen intelligently. Fewer arts programs in schools.

I'd say most of todays audience wants instant gratification with no effort. Very few people listen to much music on a regular baisi and if they do its probably the radio playing the same setlist over and over so thats all they relate to.

Why do we all do the same songs for parties and Weddings. Thats all they know and want.