The CT uses an exoskeleton to maintain torsional rigidity -- removing or weakening the roof will likely not be possible, Glass, of course, is structural (look at high-rises).
I compulsively make list and decision criteria. Most of the time, I end up having to duplicate or accept a lessor answer. So far, the only vehicle I've ever been able to "check ever box" may very well be the Cybertruck.
To me, that's huge.