Is there any mechanical fallback if computing systems and electrical drives are compromised while vehicle is in motion?

I pre-ordered a Cybertruck tri-motor over a year ago now and recently I came to think about the practicality outside of all of the obvious awesome features of this electric truck. I have some questions, some are unique to the Cybertruck, while others are applicable to modern highly computerized and internet-connected machines and vehicles in general.

(1) Cybertruck has an exoskeleton and bullet proof glass that can stop say a 9mm in short range from penetrating any of the body and glass panels. But what happens if you vehicle is crashed into a river/lake? Normally you could break normal glass windows with something sharp, there are specialized glass window breaking tools for this. But they probably won’t work on cybertruck’s bulletproof windows, how would Tesla get around this? Same could happen if you crashed badly and somehow the vehicle caught fire and all of the doors and windows are jammed, etc. What is the escape plan for vehicle like Cyertruck?

(2) As it is mostly agreed upon now that there is no such thing as an unhackable software/device, almost anything will eventually reveal security vulnerability given time, especially for complex systems such as these connected self driving machines. This is not an issue for most people, but if you are a high value target such as a high profile politician or activist, there might be people specifically targeting you for assassination for example. On a regular old ICE vehicle, if for some reason the vehicle control is compromised, you can still kick the mechanical gear shifter into neutral and delivering no power to the wheels. On most vehicles, steering wheel and brakes are still mechanically connected only hydraulically or electrically boosted, so anyhow you can still apply steering and braking. But what would happen if my Tesla is compromised while in motion? They are such powerful vehicles that I doubt braking without assist would outpower a motor that have gone rogue? And if you say that the vehicle is designed to cut off power to the motor when braking is applied, I would counter that if it’s design by software it should be considered hackable. Has Tesla given any sort of last-resort design consideration to a completely compromised scenario while vehicle is in motion? Is there some way for driver to physically disconnect battery power to all system, and relying on the mechanically connected steering and braking to still stop the vehicle in such an extreme scenario?

Thank you and sorry for my long questions.

submitted by /u/airoscar
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