Nothing "saner" about metric measures - in fact they are much less related to the normal human body than the previous system (eg a foot is more or less a foot, and inch is roughly the width of a thumb); and in some ways less handy in other ways - 12 is divisible by 2,3,4 and 6, whereas 10 is only divisible by 2 and 5.

There's a convenience in having a single system shared by different countries, that's true enough - it's just a pity the one that won out was the metric system. But there it is.