OK, so you come on over to my kitchen and use your new rules of thumb to rewrite all my much-beloved family recipes. I don't have a .4 cc spoon, so make sure you adjust all the measurements and test all the recipes so that the family won't barf and the amounts can be easily measured.
I remember when I was a kid, the metric system was the coming thing... until everybody realized our sizable investment in butter-measuring devices. Uh, lemme see,, .454 kilos... uhh.. oh never mind.