Comment by fsh
US car regulations are weirdly inconsistent. Sometimes they are incredibly strict. You can't have a convex left side mirror and the right one has to carry a stupid warning label. Importing non-antique foreign cars is practically impossible. But then, some obviously unsafe features, such as indicators in the same color as the rear lights, are perfectly legal.
The non-convex side mirror almost got me into an accident the first rental car I drove in the US. I was expecting to see more of the road than I did.