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 a

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.