Try being in aviation in the US. At any given time I can be juggling:
statue miles, nautical miles
miles per hour, feet per second, feet per minute, knots, mach, feet per mile (climb rate)
inches of mercury, millibars, PSI, Pascals (very rarely)
pounds, tons, gallons
Everything uses a random unit. It's a mess but it works, and I suppose that's why it's stuck around.