I know it's easy to sound like a nostalgic old git, but I think the media influences what is available a lot more now than in the past. Could you imagine something like Island or Stiff records starting up now, they would need Simon Cowell's permission!
I think the fact there is so much by the way of technology so everything goes "viral" that it is a lot easier to manipulate what is fed to the public (christ! I sound like Sisu on a conspiracy theory trip)