Letting them fold and having the Chinese, Dutch, Australians and whoever else pick over the remains is also not a good option. We need to keep certain capabilities under US control, and I think transportation technology is one of them. Consider the lessons of WW2, when car production switched over to military purposes.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma