I think the metric system has obvious advantages over the US system, but for temperature scales it's less obviously a positive to use one scale over another.
but I greatly support the Celsius scale over the Fahrenheit scale as it's much easier to spell.
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@foone having 0° be the exact temperature of water freezing and 100° water boiling isn't obviously positive? Knowing from a glance how slippery I can expect outside surfaces to be and how much my exposed skin will hate me is very useful. Cooking/brewing temperatures expressed in "this much above/below boiling point" is a nice bonus.
