I am always surprised to find that certain industries still use imperial units for anything. Well, perhaps other than marketing material selling to Americans.
Why hasn't the military completely converted to metric?
Why hasn't the airline industry -- literally everything at airports -- converted to metric? --- Seriously, where is the value to anyone to measuring jet fuel in imperial vs metric?
Why hasn't the entire space industry always been metric?
Remember this?
Imagine a simple conversion error caused a multi-million dollar mission to go puff! We explore how the Mars Climate Orbiter was lost in 1999.
everydayastronaut.com
Each time I hear about industries having issues because they haven't converted to metric my brain explodes - AGAIN.