[blahedo]

Yes! It is as a direct result of that book that I now know without having to look it up that a ksec is about a quarter hour and a Msec is on the order of a fortnight, which comes in handy when doing back-of-envelope estimation more often than you'd expect. (I'd already known that a Gsec was about a third of a century thanks to Tom Duff's observation.[0]) I don't see us moving to such a system anytime soon in general (tying to the circadian cycle is just too convenient) but I'm a little surprised I don't see it more often in discussions of humans in space.

[0] "How many seconds are there in a year? If I tell you there are 3.155 x 10^7, you won't even try to remember it. On the other hand, who could forget that, to within half a percent, pi seconds is a nanocentury." --Tom Duff