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Then again, as someone from a cold northern country, using celsius and having 0 as the temperature where water freezes is very handy when you need to think about driving conditions. Anything below 0 means the roads are probably icy and you should be careful.
I haven't had to think twice about 32F being the freezing point since before I could drive. It's just one of a thousand numbers I can remember. There's no particular advantage between g being 9.8m/s/s or 32ft/s/s. Nothing round about pi being 3.14. Whatever you use becomes recognizable quickly. My car takes 87 octane gas, takes 5w30 oil, has a wheel bolt pattern of 5x108mm or 5x4.25in, has a 63.4mm center bore, 320mm front brake rotors... The list goes on.