dot, your answer is good and you're right that my question could use some clarifying...
I guess the assumption my question makes is that whatever it is we have right now (the contemporary anarchist movement, if you want to call it that) is not really intergenerational, even if there are some scenes where old people are still active. That's why I said "truly" intergenerational, although I admit that's completely vague.
What I was getting at is that, notwithstanding the presence of some older anarchists,I think there is a major disjuncture between the current generation of anarchists and the previous ones, and this is not only a question of how many older anarchists drop out of the movement. It is also a question of geography, what theory gets read, historical memory, the longevity of anarchist spaces and communities, and probably a bunch of other things. In many of these respects it feels like we've had to more or less start over every generation (or even oftener). I'm not trying to whine or exaggerate how big of a phenomenon this is (although in light of your answers I guess I might be) but to look for other people's perspectives on what causes this, whether it is unique to anarchists, and if there are ways it might actually be helping us.