The entire concept of "Millenials" has always struck me as somewhat of a square peg in a round hole. As you have identified, so freaking much changed over the l

The entire concept of "Millenials" has always struck me as somewhat of a square peg in a round hole. As you have identified, so freaking much changed over the last 34 years. So much. Almost every aspect of modern life is dramatically different in ways we now take for granted, and it changed in major steps throughout those 34 years. To think the lower and upper bounds of the 18-34 demographic have all that much in common is pretty silly. That being said, generations are broad demographic sets -- not behavioral cohorts. They are highly heterogeneous sets, and always have been. In some cases, speaking of the "Millenial" demographic makes sense, especially in broad, economic terms (i.e., when talking about the size of the demographic vis-a-vis the future of the US labor market). But trying to treat the demographic as a homogeneous set, or in broad behavioral terms, is where things get dicey really quickly. Some generalities apply, but only in specific contexts.