Although I will note that the '46-64 range is still half a decade or more shorter than what you are suggesting ends in '02 or '03 (I assume it starts between '78-80).

Nope, not making this up. did plenty of research on it. Television itself, while available, was limited to only a few channels until really about the end of the 80's in most places in the US. Even cable systems, those few that existed, has 11 or 12 channels.

Black and white was the expectation from twelwvision, not color. In the 60's for example, a color television cost about half as much as an automobile.

These experiences, among others, make for big generational differences in perception of reality and in attitude.

If the trends continue, and there's nothing to suggest that they won't the adultolescence will increase even more, possibly to approach 30 years old.

Given the extending life spans, and life expectancy, quality of life in health terms, it's no wonder people are deferring traditional adult responsibilities, such as career work, marriage, childbearing, till later ages.

Of course, millenials re a lot like the early boomers in their disdain for older generations. Millenials will join groups-- groups and organizations of other millenials.