I was just looking at some upscaled old footage of NYC. Interesting thing: If you watch a video of the US at that time, the median age is 22! It's closer to 40 now. And indeed, the videos clearly show a much younger population. I wonder if it'd startled a time traveler how old we are.
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has dropped by half in decades
https://fred.stlouisfed.org/graph/?g=cOQn
so this makes more sense than I expected, smaller share of 22 year olds today than in 1980s.
But they have great cosmetic surgery.
Actually that reminds me of Moorcock's Dancers at the end of time, the protagonist going back to 19th century England realises everyone looks like they do because they have no choice.