> I am in my mid-60s, manage a machine learning team at a fine company, busy writing a new book, and getting close to being an investor in a new company.

I think you just proved OP's point. Seems like you have nothing going for you but work.

> My Dad is 96 and does 3D animation, makes movies and documentaries

This is a problem I have with modern american society. I wonder whether it would be better to give those resources to younger and more capable people who can actually make good movies and documentaries.

> and is still a member of the national academy of science.

People are members of NAS for life.

> Life ends either when one gives up learning and doing new things, or when our bodies finally wear out :-)

That's not what the guy was talking about...

But you've highlighted a lot of problems we have in our society. Too much resources and wealth have been "stolen" by the older generations like you and your father. And the younger generation are suffering from lack of opportunity and resources. I don't think this is very healthy for society over the long term. But I guess only time will tell.