Its not the wrong unit, we just forgot how to update it and its working well enough. Also bite me I dont want to deal with decimals to know the tempeture on a more accurate level.
I also realized my american appliance do this same when I try to set them to celsius (nest etc). I guess that is where this unfortunate misconception comes from.
Various groups in the US have tried to convert and it failed becauseβ¦ Thereβs absolutely nothing wrong with the current system and very, very little to be gained by switching.