One of the weirdest modern things to me is this obsession with generations. Maybe I haven't read the right stuff, but you pick up a 19th or 18th century book and they talk about the past, or conflict in families between old and young, but never this weird cohort-antagonism thing?
Could be it's random culture shit, but maybe it's because people have fewer kids, so they don't span generations? Or maybe tech acceleration means cohorts have more differences that are real?