You are confusing the content with the medium. Radio is about more than music. Radio is about programming. Once, radio was about hours of variety shows, comedys, westerns, detective shows, soap operas, science fiction, theater presentations and more. When those shows started to drift to TV, radio only then found itself as a 24/7 delivery system for recorded music. When rock 'n' roll was born, radio skyrocketed into what we've mostly known in our lifetimes. Today, too many still think of radio as the mass marketing arm of the music business, that's why it has taken longer to evolve like it did when it moved from "Old Time Radio" to "records". Because of this, new formats have been slow to get out the gate, but to great success when it has, e.g. conservative talk and more lately, sports radio. Radio must continue to seek new formats and programming in order to survive. And we must all stop thinking of radio as merely a music delivery system.