[ysleepy]

Who says people should collectively forget what an inch is?

Every other country made unit conversions.

The people will use old units for some time to buy cheese at the counter and all is well.

[einhverfr]

Yeah, right up until your car lease contract limits you to 2000 Swedish Miles per year. (Note, these are about 6x longer than American miles).

Or you buy fruit at the supermarket in Indonesia in ounces and kg (an ounce is an hg).

[reitanqild]

I guess anyone who knows what Swedish mil is will specify kilometres instead.

I cannot remember a single time I have seen a contract specifying mil instead of km.

("Mil" == 10km == 10 000m is used here as well only not in formal or scientific contexts that I can think of but maybe that is a difference between Sweden and here.)

[einhverfr]

My car lease (in Sweden) is in Swedish miles.

2000 miles (i.e. 20k km).