Go check out the windshield in your Tribeca, Rob! It is heavily
depended upon
for supporting the roof in a rollover. See how it's fastened?


Actually, the B9 frame can support twice it's weight in a rollover due
to circular members incorporated into the chassis. The for and aft
windows are designed to pop out.
Maybe it's a safety feature on the Express 30. In the event of a
unrecoverable knockdown you can try to squeeze out the ports! One
things for certain, some flexing and serious waves will pop them out.

RB
35s5
NY