It’s just a hassle to switch things when you have a large number of people who have adopted it. Even the UK which is nominally metric hasn’t had the will to swi

It’s just a hassle to switch things when you have a large number of people who have adopted it. Even the UK which is nominally metric hasn’t had the will to switch from miles to kilometres for road speeds and distances. The slow spread of globally used volumes is probably the only way it’s ever going to happen and even there it won’t affect most areas. There does also seem to be a more extreme reluctance in the US to change to more widely adopted units and conventions (e.g. day/month/year) and if anything being one of the only countries left using non metric units seems to be a point of pride. About the only SI units the us seem to use relate to fields invented after science as a whole adopted it as standard (e.g. electrical units). In one sense inches have a pleasant form of being subdivided into more easily divisible Power of two units but even that falls apart over small distances where they turn to ‘thousandths of an inch’ rather 1024ths. Useful in a world of pre-computer drawing because you could easily scale up plans but not particularly useful now.