I'm a child of the 1960s and at that time, here in California, we were taught metric from the start.

We were told that the old system would soon be phased out, and our generation would be the first all-metric generation in the US.

I was dismayed when the metric fervor abated and eventually was forgot.

And we always had metric tools about the house, due to my dad doing his own maintenance and repairs to his French car.

Yes it's odd that while the British military measure clothing using metric British civilians measure kilts and jackets in inches...but hats in the metric. BTW metric shoe sizes always seem to be more accurate than either the American or British sizing systems. Since shoe labels often have all three, I've learned to ignore the UK and US size and go by the Euro size.

Bagpipe specs have long been done in inches, but no fractions! Inches and fractions don't necessarily go together, and pipe makers generally speak in terms of .472 inch and so forth. That's the system I'm used to. I hate fractions.