It's only okay when brown people don't speak the language!
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Imperial is better for real world applications because it's easier to estimate, metric is better for more precise measurements because it is easier to make smaller.
Take temperature, Fahrenheit is better for real life because you don't have to go into decimals to describe the weather outside while Celsius is better for lab work because it's easier to increase or decrease by a small amount.
...Fahrenheit is smaller than celcius.
It's just zeroed on super-saturated saltwater freezing and hundreded on the original thinker's temperature when he was outside a bit too long, instead of freshwater freezing and freshwater boiling.
But one degree F is almost exactly 5/9ths of one degree C. About half as much. So if you hate deci-mals for some traumatic backstory reason, you'd want to use F for your fine-tuning adjustments... And C for the outdoors, which doesn't usually require as much precision. The only issue with that idea is F is scaled on two very different things, which makes some calculations a chore since a surprising amount of our science is based off of water freezing and boiling.
The IDEAL temperature system in this hypothetical decimal-hater-but-science-lover's case would be Rankine, which is like Kelvin (absolute zero is a baseline), but in Fahrenheit units instead of celcius units in the steps.
That's not what I meant, but go off. Celsius is easier to use for lab work because all of the useful temperatures are multiples of 10, decimals are easy to do math with, and simpler to record. Having the baselines between freezing water and boiling water be 0 and 100 meant it was easier to do stepwise incremental heating back when you had to calibrate analog equipment in the days we were determining relative humidity by spinning these bad boys over our heads.
Metric is also better for lab work because it's easier to put onto the microscopic scale, all you have to do is keep dividing by multiples of 10 to millimeters, micrometer, nanometer, etc.
Kelvin and Rankine are only useful when doing theoretical science and some thermodynamic and quantum mechanic calculations. Also when you're doing quantum computing and attempting to approach absolute zero. Otherwise normal temperature values are too high to be useful.