W.r.t the Celsius scale, a comment from Celsius' country of origin in response to:
> Nobody lives their life around freezing and boiling temperatures. I live my life around 50 to 90 degrees and if you live yours around 10 to 40, I don’t see the advantage.
The natural response is of course we live close to freezing! 0 °C is the temperature that differentiates frozen lakes from open lakes, snow from rain, slippery dangerous roads from regular.
> Nobody lives their life around freezing and boiling temperatures. I live my life around 50 to 90 degrees and if you live yours around 10 to 40, I don’t see the advantage.
The natural response is of course we live close to freezing! 0 °C is the temperature that differentiates frozen lakes from open lakes, snow from rain, slippery dangerous roads from regular.