because they industrialized before metricalization and it would’ve been incredibly expensive to convert all their machines and tooling to metric afterwards. same reason as the UK. a lot of places industrialized later, in metric from the start, and didnt have this problem.
and then they became the hegemon, and didnt have to convert, because fuck you, why should i cooperate with vassals.
the US will convert to metric when it sinks to the level it deserves and the customary units become a pain because nobody else is willing to deal with them and all the importable equipment is in metric.
because they industrialized before metricalization and it would’ve been incredibly expensive to convert all their machines and tooling to metric afterwards. same reason as the UK. a lot of places industrialized later, in metric from the start, and didnt have this problem.
and then they became the hegemon, and didnt have to convert, because fuck you, why should i cooperate with vassals.
the US will convert to metric when it sinks to the level it deserves and the customary units become a pain because nobody else is willing to deal with them and all the importable equipment is in metric.