As an American I recently rented a Volkswagen in Austria. I found it funny/ironic that the inside temperature settings had half degree steps with all of the Europeans I've heard complain about the Fahrenheit scale use in US. So at least some German wanted that granularity.

Maybe they did that since they had the space -- a Fahrenheit display needs to show 3 digits since 100+ degrees F is possible but if it's 100C, then you've got bigger things to worry about than your car's temperature display.

I doubt you can set the temp control in a car to 100F. Unless you are in a sauna, no one is ever going to want to have that high a temp.

No doubt if you change the settings on the car to American, it has half degrees Fahrenheit.

Wrong.

The difference between 78F and 80F is perceptible to me -- 80F is too hot, indoors, and around 50% humidity, while 78F at similar humidity is fairly comfortable.

I agree that it may not be the most useful thing, but it's worth pointing out.

Also- "2 degrees" of global warming doesn't sound so bad to a lot of fahrenheit folks, its actually closer to 4 degrees in F

Yeah, I think there’s something to this. In the US, the news talks about climate change using Celsius, presumably because that’s how scientists measure it. But from a messaging/persuasion perspective, it’s bad. The average American thinks that “2 degrees” isn’t so bad. And in Fahrenheit that’s (kinda) true. I think climate change should be discussed using the units that the public has intuition for.