I recall we were pretty much set to change in 76' or so and at the last minute couldn't pull the trigger. Canada I heard was a little miffed we balked as they had put everything in place and made the conversion. Since probably 90 or maybe even 95% of Americans can't tell you how long a mile is or how many square feet in an acre I'd say our system is just too difficult to remember to be worth the trouble. Doubt me? How many TBLS in a cup?gallon? About the only thing I have been sure of for a long time is the ton. 2000lbs and that is only because it is an easy number. Not like 128oz in a gal.
yah,unless yer dealin in long tons....;-)
Nautical Miles are much better for navigation than meters. Base 10 is good, but no one is suggesting base 10 time units. (100 seconds to minute, 100 minutes to hour, 10 hours to day).
Because the earth is round 360 turns out to be a magic number