For that my argument is, have a sufficient large memory card ( not talking 1TB card )
Say i crash, drive off a cliff and end 50 M down the mountain and i am unconscious and trapped in my car, if no one find me and my car are still running the motor, then it would be bad of course as i could be there for days untill the gas run out and the battery die.
But if someone come and rescue me within say 5 hours, the first thing they should do is turn off the car, so if my camera have over 5 hours of footage the crash are still there just as regular footage, but it is there.
And this is what i have always been told here with accidents, first thing is make sure the accident dont get worse, this mean make sure no more cars run into the already crashed cars, and stop the engine / cut power on any cars involved to cut down fire hazard, and then you can start to do first aid and have others call for help direct traffic, or do it all yourself if you are all alone on a remote empty road.
So i do not fear loss of a event even if i do not have G - sensor on while driving, or are unconscious so i can not press event button, the main thing is to have plenty of memory card space, you will most likely be found within minutes or 1 hour max.
But it is only 2 years ago there was a accident here with a kid crashing at night out in the country, and rolling into a field, and then it was hours before someone came buy and noticed the car on its roof in a field.
If the police / ambulance have been there they always tape up cars, so passers by know it is a old accident taken care off.
So i feel 64GB for every camera in the system are okay, but people should get 128GB for each camera if possible, then they have room for a lot of time before a non locked event would start to be deleted.
I know many other countries are much larger than Denmark and have much more remote places, and actual mountains to drive off which we dont.
But if you are injured bad and trapped alone for hours chance are you are not going to survive, but of course if you have someone left behind it would be nice if they could get insurance policy, and if another car was to blame he can go to jail.
I have notified my 1 friend and my sister that if i crash bad, go to my car at police yard or garage at once and get memory cards from all cameras.