> Also, IMO stuff in decimal is almost always easier to compare than fractional. When someone asks me for a size up from an 8mm wrench, I know to grab the 9mm.

> Also, IMO stuff in decimal is almost always easier to compare than fractional. When someone asks me for a size up from an 8mm wrench, I know to grab the 9mm. When someone asks me for a size up from 5/16", it'll take me a bit to get to 11/32". A lot of that is just due to how we teach fractions — but decimal notation really is nice. I wish that we used duodecimal instead: all the advantages of decimal, but with a far better base.