Even the one I accidentally subjected to extreme overheat was basically undamaged and did not come unlaminated - that explosive welding is good stuff. The only actual damage was minor pitting caused by ginger of which there was quite a bit in the pan - sulphur compounds eat metal, and at extremely high temperatures they'll even pit stainless steel.

Incidentally, if you accidentally leave a cast iron pan with water in it overnight, and there are bits of ginger in it, you will have some very significant pits in the metal by morning.