In the past, laminated glass was usually installed in the windshield, with side and rear windows being tempered only.
The difference is that tempered glass is per-stressed so that when it cracks, it shatters into many tiny and dull pieces. Laminated is the same thing, but with layers of plastic sandwiched with layers of tempered glass. Laminated glass will still shatter, but will be held together by the plastic layers.
In an emergency, small improvised, or purpose built tools meant to shatter tempered glass will be useless if the glass is laminated.
Even a purely mechanical door can be extremely difficult to open when partially submerged. The pressure of the water will hold the door shut until the water equalizes on both sides of the door.
But yeah, once totally submerged and flooded an electric door likely won’t open while a mechanical one will.
Yup, that’s what I learned about being in a flooding car. Wait until it’s filled with water and you’ll be able to open the door since the pressure is equalized. But not having the option at all is bonkers, however someone else mentioned that tesla does have a manual lever, in which case it makes this whole debacle even more tragic and stupid.