I agree with there being lots of old people in the community of agile-enthusiasts. My theory is that this is because most young people have never worked for a large company with lots of top-down processes and agile is just the default/what comes naturally.

This is somewhat similar to the issue of the Cathedral and the Bazaar in software engineering. Most young people have never even seen a Cathedral and just consider the Bazaar model the default.

Edit: No offense to anyone in that demographic btw. I have great respect for everyone involved in that community, I just don't think it is very interesting for kids that never knew anything else