Re AC dealing with degrees Celsius: I have yet to find a thermostat of any kind that works in Celsius but does not allow half-steps. I'm sure they exist but th

Re AC dealing with degrees Celsius: I have yet to find a thermostat of any kind that works in Celsius but does not allow half-steps. I'm sure they exist but then the problem is more lazy design than the units used. In general I don't mind much the difference between metric and imperial except for how poorly the different imperial units interact. I don't think there's many people that can tell you from the top of their head how many gallons are in a cubic foot. Looking it up it's some awful repeating fraction. Try the same in metric and it's much easier: One cubic decimeter is exactly one liter. A cubic meter therefore contains one thousand gallons.