BYD margins in America would be razor thin.
BYD is going to kill in developing and emerging markets, but it doesn't stand a chance in the American SUV / truck / sports car market. It'll also push America out of international markets, but it won't be able to edge into American consumer markets.
It's not big auto that's the problem. It's the American consumer.
US automotive regulations have pushed for lighter, smaller, more fuel efficient coupes. Yet people keep buying the big and heavy trucks and SUVs.
It's cultural.