I am really surprised this didn't kick up

So what happens to all the spot welds in the flexing areas? hmmmm Those flexing areas would have the same "work hardening" problems as well, would they not?

No full frame.... think bean counters and cost. That is another reason they were not full frame. Use the other structures that are required to carry load instead of a full frame. Lighter body means less material.

I've seen NON HP cars have door closing and alignment issues, no broken windshields either. Jack up the right front and see how long it takes to lift the left front... no twisting there. These cars are flex monsters.

Everything is a trade off. Show me a lo-po car that has the spot welds torn out of it from a set of connectors. Connectors make everything a bit more solid.