As someone rapidly approaching "old", this is the exact mode of thinking I now occupy much of the time. It's awful to think of how many summers I've passed working on code or, worse, powerpoints and documents, in a 71F office.

I know quite a few very senior people who are proper old, and when I mentioned this to one of them, his response was, "at this point I'm glad to be alive, and no one glad to be alive has time for that stuff." This was just before he retired.