I did that, but then adding 0_degC + 0_degC gave 273.15_degC. I think that would be surprising to many people. In reality I don't remember ever having to deal w

I did that, but then adding 0_degC + 0_degC gave 273.15_degC. I think that would be surprising to many people. In reality I don't remember ever having to deal with physics formulas that used °C instead of Kelvins, so the only time I need to use °C is when presenting the temperature in the UI: temperature.in<si::Celsius>()