We in Canada supposedly adopted the metric system in about 1970, though it took about 7 years to become used extensively. However, it has never really been a hit here, and now we tend to dabble in both systems for various purposes:
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This sometimes leads to some pretty significant confusion:
https://en.m.wikipedia.org/wiki/Gimli_GliderFor my model work, I have a Logan lathe and a Burke mill, both Imperial, so I work with that. If they were metric, I'd go metric.
Confusing enough for you?