Wow, 42 years old, huh? Hard not to be a little jealous. Being pretty close to his age, it's maddening to think that with a different roll of the dice I might have been that person. Or I might have been unemployed and a heroin addict in Appalachia. Life seems so random and non-deterministic.

Good on him. I sometimes wonder why more people who are insanely rich don't just retire and spend the rest of their lives doing something else...or doing nothing. I think of the C-level execs in my own company--they each have so much that they and their families for generations could literally do nothing for the rest of their lives and still continue to get richer via interest. Why go on working?