I'm one of a handful of people in the world who knows the numerically dysfunctional and idiotic English system of measure. It takes a lifetime of learning and memorizing. I can ask questions about the English system till the sun comes up tomorrow no one here can answer. But even I must always be armed with a calculator. This is not a slight. One must dedicate himself, as I have done. Yes, I know the difference between the international foot and the U. S. foot.One bone to pick...I like the English system because it is what I am most familiar with. <----there is some humor there.
I can visualize the gallon because I see it in the fridge everyday.
BTW, I am comfortable with 2 liters for the same reason.
I can visualize 5 lbs, 10 lbs, 25 lbs etc.
The mile if I remember was based on the average roman soldiers steps and was 1000 paces per mile. The odometer is in tenths.
The french took what was almost a yard and made it a meter. Paranoid, envious and arrogant are the francophones. Just imagine if they had taken the mile and made it the kilometer. Made a gallon a liter etc.
I like the foot and the yard. I dislike the inch and its 16th divisions.
As for sockets and other tools it does not matter if it is metric or English the tool I need for any particular job can not be found when it is needed! This is the number 1 rule of home and car repair.
One does need a degree in advanced rocket surgery to convert Canadian gas prices into the American equivalent. And setting cruise @ 80km/hr reveals that the Canadians are stuck on the old 55 mph limit in many areas. Its all dreadfully slow but makes for a nice vacation.
I like a base 10 system in concept but can not visualize the metric because it is not what we use.
I can have second graders with a basic knowledge of the metric system in 4 hours.
I can ask any dope on a street corner in Toronto, how many meters are in 1.2 kilometers? He'll answer the question. I can ask genius James Woods, how many yards are in 1.2 miles? He doesn't have a clue.