One selling point for the Model S is the famous story of how it "broke" the testing machine which tried to crush it. I *assume* that test was conducted with a solid metal roof. Any engineers here who can comment on how much, if any, crushing resistance is likely to be traded away for a clear view in the panoramic and/or new all-glass roof? I know Tesla strengthened the car in other ways per Elon's public comments after the all glass roof was implemented earlier this fall. The all glass roof is sexy and I'd rather have it than pano on my next car for the clear view from the interior. But I always assumed the cross bar in the center of the pano roof provided additional structural support. I have zero mechanical experience and only one year of undergrad physics so I am probably wrong on this. I do have some experience surviving horrific car crashes however so crash survivability is always on my mind.