A lot of times what makes these lines be drawn is generation gaps. They supposedly make lines possible. Bob Dylan's generations' message to the preceding . The Clash to Dylan's. I don't think us Ys have a clear line with the previous generation. Maybe we'll find it at some point, but the pattern hasn't changed so much.

I imagine a lot of that is written as history is written, not based entirely in reality.

Anyway, I get this feeling that these 'generations' that can be characterised are not inevitable & constant. There were just a few that were.