I don't think he meant about the particular details. To give a minimalist example, you could say that people who enjoy using old cameras (even though they're no

I don't think he meant about the particular details. To give a minimalist example, you could say that people who enjoy using old cameras (even though they're not as good as modern ones) share something in common with people who enjoy hooking up their NES and playing Mario 3 (even though some might argue that it's not as engaging as their favorite AAA game). The two objects of interest are not the same, they're not in the same category, but they're both tied by the same kind of enjoyment for retro things. So it's not really about which shirts are worn by geeks and hipsters at the same time ...