Anyone know how feasible enough to require modern (powered-everything) cars have at least 1 window that has backup manual rolling for this scenario? or is it just too rare for the increased complexity?
Manuals are actually less easy to open, if at all, once you get to the point where you are mostly under water. The electrics will function for quite a while and when you get to the point where they don't the manual is not going to do much anyway.