Fuel economy and price aren't the only concerns here. You may like the fact that your old Ford has tank armor for body panels when you lean against them, but you wouldn't want them in a crash. Those era vehicles, all the way until the mid 90's, where death-on-wheels. Now a days to meet crash specs a vehicle needs to be soft, lots of crumple zones. And body panels contribute to that.
What's funny is that modern sports cars use the same design theory and are generally considered to be better than ever. Sure, they weigh more and a larger, but the chassis are the stiffest they've ever been allowing for incredible consistency. Put a roll cage in an older car (70's, 80's, 90's) and you'll see how much flex there is in the chassis. Put a roll cage in a new car and your jaw will drop, there is so little flex in the new cars....all while being safer than ever.
All that being said, this has got to be a boon for people in the rust belt...