Work peak and professional decline (2019)
Related: The notion of "retirement" is a relatively recent invention.<p>Traditionally, when you were too old to work the farm or prove the theorem (sorry, cognitive decline is a well-documented thing, and tends to coincide with physical decline[1]), you would "retire" to a productive life in less-demanding pursuits: caretaking of the grandkids, woodworking, food preservation, writing, etc.<p>It's important to maintain hobbies in your youth such that when the time comes, you can turn those hobbies into productive and enjoyable enterprises. Certainly many would disagree, but such a path seems somehow "better" than popping Metformin in front of a television in a Boca Raton retirement community or tooling around the country in an 8 MPG RV.<p>[1] Yes, I'm aware that people like Dave Cutler are the exception to the rule. But they are, to be sure, the exception.