[jambo]

Being educated in England over during the 80's & 90's I work in:

millimetres, centimeters, meters, kilometres and miles per hour.
millilitres, centilitres, litres, and pints.

The fact is that when we move from academic, to practical circumstances, people like to use the most familiar units. I've become quite happy and fairly inconsistent in using either system as needed.

Jambo