[Robert]

Interesting. Doesn't heat cycling reduces ductility in steel or increases brittleness? Wonder what's the trade off BMW engineer was willing to accept. Thank for the informative video. I learned quite a bit. However as any marketing video it only provides 1 sided story. Of course there is a tradeoff between weight and safety. In this case the tradeoff may be neglect-able for intended purpose but it must be minuscule, to the 10^-6 decimal point because when BMW is producing a million car a year. If not it means BMW produces one unsafe car a year :P