It seems to me that we human beings have fallen into a deadly trap of worshipping change for changes sake. Please remember, though, that "any change increases entropy (unavailable energy). Therefore, any change that produces no net positive good is invariably harmful." (Gene Wolfe - another science fiction writer). It seems to me that popular music is undergoing a process of decay and degeneration - with each successive style or genera (OK, fad!)being more empty and vacuous than the last - turning into meaningless noise, that is. Just as marketing men have discovered that they can sell bottled water (and will soon be selling bottled air, no doubt) they have also discovered that they can sell contentless canned noise. I may be an old fogey, in my 50s, but it could also be argued that I have lived long enough to have a proper perspective on this (I've seen endless fads in music come and go).