I was careful in my wording to say the previous generation. It’s almost always uncool. For instance, 80’s music went out of style almost immediately when Nirvana came about. Then 10 or so years later some 80’s music was enjoyed ironically and now today the beat of it is preserved as “classic”. It’s OK for anyone to enjoy but it isn’t influential any longer.

I would add the distinction that the "classic" stuff can be cool, but with a caveat that they aren't enjoying it at the same time as the old-timers in the same venue. Retro 80's party with a bunch of twenty-somethings? Cool. Retro 80's party with a bunch of 50 year olds? Well, the young-in's wouldn't find that fun.

Right - the young people participate in the simulation of 1980’s culture and the 50 year olds in the reality. Although they use some of the same artifacts they are entirely different experiences.