> biased with older generation that [has] grown up with

It is a matter of aesthetics. So it is possible that the gap is not about nostalgia, but about artistic exposure.

I could give you an example of a suggestion that there has been a flood of degradation: I was exposed to a television recently tuned to a videomusic channel: the limited samples I glimpsed were about "young and fit", as if the collective visual show converged to heavily "body oriented", in a heavily basic manner. When "commercial to the median" floods the spread imagery and artistic awareness is on the contrary not encouraged, you can get - and I have witnessed them - people nodding at the ugliest things.