Is what a company I used to work for said. That doesn’t mean we did anything that made sense in metric though. We still used standard hardware and designed everything in inches and feet. The only thing metric was converting everything to metric on the drawings. So we had bolts that were 12.7mm and parts with a 25.4mm hole etc etc, but hey we were a metric company 👍

Bonus game: what do these three things have in common?