The same argument was made regarding moving from frame-on-body cars to unibody cars in the first place. It turned out that the weight and assembly savings and t

The same argument was made regarding moving from frame-on-body cars to unibody cars in the first place. It turned out that the weight and assembly savings and the increase in crash safety far outweighed the costs and risks, and that metal is pretty recyclable, so you just end up salvaging the parts you can and junking the rest.