Just an aside - English customary units are actually defined based on metric units and have been for a very long time (the original International System of Units treaty was created in the later part of the 1800's!)
The entire world has 'adopted' the metric system - the U.S. just tends to have more diverse systems of measurement in everyday use - and they also don't form a consistent system (unlike the SI).
As a hobby wood enthusiast - many dimensioned woods tend to come with mm measures - even more true of veneers (well - most do come from other countries). Though we still use board feet and pounds for a lot of stuff as well.
IIRC, there are places in the U.K. that still have miles signs (maybe this dates back to the Roman mile stones?) but speed limits are posted in km.
The entire world has 'adopted' the metric system - the U.S. just tends to have more diverse systems of measurement in everyday use - and they also don't form a consistent system (unlike the SI).
As a hobby wood enthusiast - many dimensioned woods tend to come with mm measures - even more true of veneers (well - most do come from other countries). Though we still use board feet and pounds for a lot of stuff as well.
IIRC, there are places in the U.K. that still have miles signs (maybe this dates back to the Roman mile stones?) but speed limits are posted in km.