Firefighter here. I wouldn't be especially worried about the glass. Hitting it with a hammer isn't all that impressive (take a hammer to your driver's side window... I bet you'll be surprised how ineffective it is).

But flick a broken spark plug ceramic piece at it, and it falls apart.

Maybe the side windows are not that strong? Interesting question nonetheless.

Strong glass doesn't necessary has to be hard to remove glass. Those are two different things.

Pressing a mechanical button or two should easily disassemble the glass gracefully. At the same while the glass is fixed it should ideally be immune to damage.

Is there a danger that the metal could crumple over the edge of the glass, preventing the removal?

Mechanical buttons have a tendency not to work after big impacts/accidents.