I'm blissfully unaware of it's existence when driving
It's funny you say that, seeing as how Canada is the #1 country we import our oil and petroleum from. Maybe think about that next time your driving?
I'm not saying anything pro or anti metrification. I'm merely saying that Canada is an important neighbor and trade partner. Mexico is too. These are important countries for our economy and they are on the same continent. So you shouldn't just ignore them. Whether that means we need to adopt metric is another argument altogether and certainly not one I'm going to wade in to.
The world is coming to an end--save your buffers!