Well…there is something to the life stages/cultural currency bits. I say that as GenX.

Growing up everything was about Boomers - 50s nostalgia was huge, every gritty character had been in Nam, movies were people in their 30s looking back to college, TV was about having babies. None of it meant anything to us. Kennedy was shot years before I was born. We didn’t remember Nam, Nixon or the Beatles. It just didn’t feel like there was cultural space for us and our issues weren’t worth discussing in public spaces.