UK and USA should switch to the metric system to be honest, but I do agree that it should be up to the ppl in thsoe country to decide
What about all the plumbing pipes and fixtures? should they all be converted too? Should we have to put in conversion fittings just so we can all use metric pipes? What about light bulbs? Should all the new lights be required to only fit metric threaded sockets? Should all light fixitures be required to be updated with new metric sockets? What about drill pipe? Should the oil and gas industry abolish the use of API standard pipes that are dimensioned in inches regardless of whether the pipe is made in the US, Japan, or China? Are you willing to pay $10 per gallon for gasoline in order to pay for a conversion to metric? Or should that be $2.64 per liter? Also, shouldn't the commodity markets abolish the barrel as the unit of measure for oil?