> If this is the case, then when someone entered the workforce has absolutely no relevance. What is relevant is staying current. It is absolutely ageist to assume that a 50 yr old is going to have more trouble staying current than a 30 yr old.

I might be wrong, but I got the sense that the comment you're responding to is trying to make the exact same point. It even says that one point that the uncle's age was completely irrelevant to his not learning the newer technologies.