Actually while they're useful, they're not that useful. The point is that being able to divide the day up into 10 chunks, which is just about the only thing we

Actually while they're useful, they're not that useful. The point is that being able to divide the day up into 10 chunks, which is just about the only thing we can't yet evenly divide it up into[+], is even less useful. It's certainly less useful than the gargantuan international effort it would take to change one arbitrary system for another. [+] And that's not even so bad - 2.4 or 2:24