I live in one of the most populated cities in North America. The temperature on Saturday is forecasted to go down to -18°F (feels like -29°F with wind chill). It's not at all unusual for temperatures to be below 0°F in winter in much of the world.

> Once you arrive at the point where you're measuring various things, I'm not sure it matters what scale you use so long as the values align as you expect.

You can't have it both ways. The entire advantage you proposed for Fahrenheit is that the outside temperature is often between 0 and 100. It's a tiny aesthetic advantage that doesn't even work very well because 0°F isn't actually the coldest temperature we get and 100°F isn't the warmest.

You're right it doesn't matter that much if water boils at 100° or 212°. It's just different numbers. But by the same token, it doesn't matter if the warmest weather is about 100°F or 40°C. It's just a different number. At least 0°C and 100°C are actual points that mean something and are relevant to everyday life, while 0°F isn't really anything. As I said before, the weather outside changes more at 0°C than at any other temperature.