I'm indifferent, and I'm a physicist.
I like metric for length, but Fahrenheit/Rankine uses smaller units, which means more precision without having to rely on decimals. I also don't place water as particularly more worthy of being the charter for a temperature scale than several other important elements/molecules (Oxygen or Carbon come to mind). It isn't any more logical just because the spacing is 100, and Kelvin uses larger units than Rankine.
And no one uses metric time to my liking. I'd like to see there be 10 hours in a day and 100 minutes in one of those hours. The week and year would still be foobarred, but at least the hours and minutes would be easier to translate.
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See, the imperial system (and time) are based on some ancient Babylonian system which was base 12. Or base 60, I forget. Either way, that's why you get 12, 3, and 5,280 (feet in a mile). It's also why you get 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 3,600 seconds in an hour. These all translate well into base 12/60, whichever it is.
We don't use base 12 or base 60. We use base 10. Because fingers/thumbs and toes. ^_^
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I also don't like having to change while other people get to not change.
So if you want me using metric, then I demand you use METRIC TIME! And also Rankine. Just because Rankine is fun to say.
And, honestly? I'm not sure of a good reason not to switch to a base-10 time. There really isn't one. And then "everyone would have to relearn time!" isn't good enough since you're already demanding people relearn length and temperature.
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EDIT: I should also say I would favor it being done gradually over time instead of instantly. Like start teaching it in the schools and using it alongside the imperial system (like reading online articles that say values in $, pounds, and euros, or miles and km side by side) so people get used to translating them.
Then, once everyone basically knows it, you can dump the old system.
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I guess my best analogy is language.
Suppose you have a society that has some overly complex language no one wants to use EVER (and I mean REALLY bad. Like 100 times worse than English.) So what do you do if you want to get rid of that language?
Well, you first make all the people bilingual. Teach them all English in the schools, adopt English as the second language of the state/country, provide free classes for people to learn it, ect.
Once everyone can speak, write, and read English, and the older people can at least understand enough of it to do whatever they need to do, then you can slowly remove the old language from common and official use. By the 50 year mark, you can get rid of it entirely except for historical purposes.
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Units are a language of their own, so I think the parallel holds. Like I can deal with metric units of length fine. I see a meter as approximately a yard, and miles and km are large enough I can think in either term more or less the same (I just think of them in terms of football field lenghts.)
...but Celsius still screws with my head. I can't get over 20 degrees being a comfortable temperature. XD
...though that does remind me of the day that I thought that VGAPlanets' "temperate" planet would actually be a boiling hot wasteland (50 degrees Celsius was the middle temperature. Likewise, the "arctic" planets of 0 degrees Celsius wouldn't actually be all that bad...)