[mahkeiro]

0°C tells you the very practical information that it's freezing outside and that you must be careful, or you can expect snow. For F° you have to know the value by heart.

[Mountain_Skies]

Zero is just as arbitrary as 32 but ever so slightly easier to remember. Anyone for whom that slight difference in remembering is actually a real impediment likely has other issues that require them to be under the care of others so it ceases to be relevant to them. At the other end, 100 vs 212 is of no practical use for anyone. Outside of the laboratory and manufacturing, people just boil water without thinking about the number associated with it. And in those settings, many other variables are tracked so the difference is of near zero consequence.

[Y_Y]

Please sir/madam, if you can, spare a thought for us lost souls who spend most of their finite lives in the laboratory and/or manufacturing.

[soco]

So to put it short: if I know what I'm talking about I'll use K, and if I have no idea it doesn't matter anyway.

[baq]

Even that isn’t quite true because you can get ice on the road or the sidewalk when air at 2m is ~3C.