It has benefits, like it works perfectly with Metric, where Fahrenheit is based on arbitrary numbers that have nothing to do with anything else.

A 1x1x1 cm cube of water at 20°C weighs 1 gram and has a volume of 1mL.

Temperature, weight, and volume are interlinked this way.

What is that 20°C? Why is that a better number than 68°F?

I'm not arguing against metric in general, I'm arguing that the temperature part of it is just kind of thrown in there because they were both used in France.

It has nothing to do with France. Save your "Freedom Fries" outrage for something more deserving.

I think anyone, given a choice, would pick a simple, round number like 20 over something wacky like 68.

Celsius is based on arbitrary state change temperatures of an arbitrary chemical, just like Fahrenheit.

And only at an arbitrary pressure that happens to be based on the sea level of an arbitrary planet at an arbitrary point in time.