If people don't keep on paying for music then music will stop evolving according to this article
Just as the strongest and healthiest plants and animals pass on their good genes to future generations, researchers claim music evolves as musicians copy the best aspects of other artists' work while filtering out their less popular traits.
This means that every time someone buys a song, they are contributing to the "natural selection" process by which the best songs are rewarded with success and the worst ones fade into obscurity, the scientists said