I do agree about the date formats but Fahrenheit makes a lot of sense for day to day casual use. Below 0 is pretty fricking cold and above 100 is pretty fricking hot and the degree increments are about twice as granular. For a lot of scientific computations an absolute scale like Kelvin would make more sense but that wold obviously be ludicrous for day to day use. Celsius as an absolute scale actually seems inferior to me and, as another commenter noted, people in the US doing engineering etc. are perfectly comfortable with using SI units as appropriate.

Really? Almost nobody uses reasonable date formats. YYYY-MM-DD is the only reasonable format, but afaik, US and EU both tend to put month and day first, day/month/year is consistent, but still unreasonable.

Caught up? In most metrics the US leads, so I'm not seeing a great argument for forcing people to switch to Celsius and metric. And you're assuming we don't already use metric extensively.

I think the only people who -really- care about it are non-US people. Here in the US we know how to do conversions as necessary, and we don't bitch about it.