The excuse of the zero point requiring more negative numbers reminds me of a running discussion with my dad, who would debate that negative numbers meant that the system was wrong. So one year I got him an outdoor thermometer marked in both F and C, removed the cover, and added degrees Kelvin. He still has it hanging on the end of his garage... but I think he is probably still using F!

Having lived all over the US and making regular travels to Europe, I still prefer Fahrenheit's scale. It regularly but infrequently breaks 100 F here and often gets down into single digits. Fahrenheit's scale roughly matches my annual experience in a way that Celsius' does not.

For scientific experiments, it is great to know where the state changes of water are. Temperatures vary wildly from earth's annual climatic shifts. Still, Fahrenheit is a great benchmark for earth's temperate zones. I would guess that it's even more useful in the tropics, where the weather forecasts in Celsius must be monotonous. The argument that the European cultures that we regard with prestige use Celsius does not make it rational.

who cares!?

The UK government forced the Brits to go metric in the 70's and they still use the imperial system in parlance. It's a cultural thing and will likely never change.

As silly as this might sound... maybe using Celsius would have a psychological effect for us (at least at the start) of making things feel a bit cooler for us in a hot summer day... after all, which *sounds* warmer, 35 degrees (C) or 95 degrees (F)? Of course, such an effect would wear off pretty quickly with enough hot days!