You may never need it for your own rescue but you may be involved in this type of situation, especially with the number of Tesla cars on the road.
Some are spring loaded and include a seatbelt cutter.
Some are a hammer with a point that will break the glass.
Yeah, I gave the GF a window breaker when I discovered her Trailblazer had a Death Sequence to it when the battery charge fails.
-Loose or slipping engine belt.
-Battery drains down.
-Car stalls at stop.
-Battery does not have sufficient charge to start the engine/restore electrical.
-Ignition switch does not release the key when battery is run down.
-Driver must exit via driver door’s manual unlock and enters passing traffic without parking or break lights illuminated. Key remains in the ignition.
-Kid is in the back seat and locked in due to no power and no key fob or power to unlock the doors.
Then there’s the whole driver side electric door accessories shorting and starting a fire in the door -a known issue. Throw in the mix a kid in the back seat where there is no keyed unlock = Parent freak out -should they survive exiting into passing traffic.
So a window breaker went into the center console bin which has a manual latch.