I wouldn't mind going metric, but then I've been through 7 years of post-secondary chemistry classes, and that's all we work with. But I need to know the "normal" units also in my work at a chemical company, because stuff is packaged and sold in containers measured in gallons. Of course, we buy stuff from overseas in 25 kg bags, which we record as 55.115 pounds our inventory system. A couple problems I've noticed with the SAE system is also with cooking - when a recipe calls for ounces of something and you're not sure if it's weight or volume. I've also noticed unit confusion with nutritional information on food labels. Sometime the serving size on the label is stated in different units then what the package is sold as, so it's not clear how many servings are in a package.