You are obliviously ignoring the central point in the pursuit of your dull obsessive resentments. This isn't about how music has evolved, it's about how its representation in the mass media has evolved.

A lot of music can't evolve because it only lives on recordings. 20 years ago you had a much better chance of somebody playing a Toscanini LP or an Ellington 78 at you than you do now. Archives of much more varied stuff are now available. Go to a site like Excavated Shellac, or the BBC sound archive, and you can see vast resources of stuff that ought to blow the minds of kids the world over and fire off all kinds of new developments, dead as it may be - there's stuff out there NOTHING like any music anybody living has ever heard.

So how is a kid of the X-Factor-viewing generation ever going to hear about it?