You watch how quickly the suppliers start to gobble each other up. The big makers don't want to deal with a myriad of small suppliers, they would much prefer to buy in bulk from one major supplier. Of course that carries its own vulnerabilities as well, we know this industry is too big to fail anyways
I just always find it interesting to see how international a vehicle is. The parts really come from all over the world. I don't think that car companies can really say they are from a certain country anymore. The auto industry is completely international.