We can say that they have already become
In the past, we only saw cars manufactured in our country on Polish roads. American cars were rare, and once they appeared, they certainly attracted attention. The owner of such a car could be proud, because having an American car was a proof of high position and possession of a lot of money. However, the problem arose when the car broke down and special parts for US cars were needed. It wasn't that easy to get in the past.