Long story short, my mom’s car was hit, with witnesses, and it was 100% the other driver’s fault (Mom was parked, with her keys in her pocket - the other driver was just starting a road test, which, thankfully, she failed. And this means there are reliable witnesses).
Mom has a 2007 Prius with 130k miles that was not in great shape to begin with. I am seeing value estimates ranging from $1k - $4k resale value. If the adjuster sees any significant damage due to the accident, repairs are going to be a large chunk of the book value of the car.
At what point would the car be declared totaled, and what would happen next if it is? Honestly Mom needs a newer car anyway, so it might not be the worst thing in the world as long as it doesn’t leave her too much out of pocket.
(Complicating factor: Mom and the other driver have the same insurance company.)