I think there are peak ages. Note the plural. And we are always in transition. But then the question becomes what you can do with what you have. Compared to

I think there are peak ages. Note the plural. And we are always in transition. But then the question becomes what you can do with what you have. Compared to when I was 20, my ability to solve highly technical problems is slowly fading. However my ability to solve most problems is still getting stronger.