One of the things I observe about the oldies living around me is that they appear to have lost the ability to learn things or patiently listen. I am not sure if this is the case with all oldies. I know of Jerry Weinberg, who in his seventees and eightees is learning as much as he must have done in his twenties and thirties.
Age might not be the barrier to learn, its just that they learnt a way to live without having to learn.
