You guys have covered most of my pet peeves and given reasons that make them more acceptable.
United States tried going metric but it wasn't accepted. It just cost a lot of money to change signs, etc. and then change them back.
Why are speed limit signs in the U.K. in Miles Per Hour?
Speed limits in the UK: know the laws | RAC Drive
I'm sure people selling liquids charged more per volume when the changed packaging to liters. In the end, nuts & bolts are inch and metric in the same piece of hardware, cars especially. But few store have a good supply of metric fasteners and I had to buy metric drill bits online.
A vessel traveling at 1 knot along a
meridian travels approximately one nautical mile or one
minute of geographic
latitude in one hour. I haven't seen anyone converting days, hours & minutes to the metric system.
This one has bothered me lately. Why would you use a comma in stead of a decimal point? How would you interpret $2,345,543,95 ?
Do you still call it a decimal point? Or a decimal comma?