The British imperial system had a lot of weird stuff, but the United States had done everything
Britain officially switched to the metric system in 1985 after a bloody effort
But there’s still quite a few imperial units in real life
Like the normal muscles of Korea
Tweep Dow Chain Furlong Pantom, etc. There are many things I’ve never heard of in length
Grain stone, hundred weight, etc. There are a lot of interesting things
The same goes for volume