I know you said /s but I'm feeling all serious or something this morning, so ...

- The US government's official policy is metric (and has been for something like 50 years now).

- The population uses a mix of metric and US customary units, not imperial.

UK is kinda similar, I suppose, but their typical usage of metric/imperial tilts more heavily in favor of metric. I wonder how many other countries are also still doing mixed measurement systems at this point?