Despite tool sizes and other conversions, we are very late to arrive on the SI scene. Even Medical Labs and research groups are using the Metric System to report values here in the U.S.
Problem is, we have a big economic problem (along with the rest of the world) to sort-out first. Then health care, education, law enforcement, etc. It may take some time to put it in the minds of the average American as an important issue.
I'll sign on the dotted-line to immediately convert, but the rest of the Country will certainly need to catch up. Take a look at the Canadian conversion controversy in the 1980's and amplify it.
RH77
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“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein
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