bugbear":1spgj9ub said:
I don't think any of the units are especially suited to measuring particular things - in the "old days" virtually every trade had its own units, feet and inches be damned.
You've just contradicted yourself in one sentence
These trades had their own units because they were convenient.
For example, measuring horses in 'hands' at least means the thing isn't going to rear up at the sight of a measuring stick of some sort!
And French and German tradesman seem to have no trouble making "human" sized tables, chairs and houses.
It's not that you can't, it's that a measure divided into twelve (and fractions) is easier. Anyway, before Napoleon they used feet (which is, after all, an "Italian" measurement!), and after Napoleon they still used feet until they were forced not to!
I think Brits of my generation are just messed up by growing up with one set of units, and then having to half learn new ones.
I note that many "old" carpenters who have been forced to use millimetres daily by trade practice have no difficulty, and chatter happily about door openings in mm to my utter bafflement.
It's those with a choice (in which group I put myself) who seem most troubled.
I know what you mean, but some things are simply perverse: magnetic tape, for example, has always been measured in inches (not sure about wartime German paper-backed tape, but anyway). In the industries that use it we've always had 2" down to 1/8" (audio cassettes). Suddenly, in the computer industry (long a bastion of Imperial, incidentally), 1/8" became "4mm" (DAT), and 1/4" became "8mm".
Why describe it incorrectly? The physical width didn't change, and it
wasn't ever in whole metric units!
I think it's the same political correctness that gave us regulations on the straightness of bananas and cucumbers...