There are expensive cars in Europe and elsewhere, too. The issue is, yes, they are too big and do not age gracefully.

Yes, luxury cars are everywhere. But everyday "common" cars are very region specific. It's not about quality; it's hard to buy a "bad" car these days. But a car for the USA market has different design considerations compared to India, or Japan, or the U.K., etc.

They are mostly built of tin.