Every modern used car on every lot in the country still has the previous owners phone book transferred via Bluetooth along with their navigation destinations and probably garage programmed too. This isn’t new or unique to Tesla.
"video, location and navigational data showing exactly what happened leading up to a crash"
So also not unique to Tesla.
My Honda has a continuously operating camera, I would be shocked if it didn’t record a few seconds of video.
Not that wipe always wipes. In my second hand BMW i3, I wiped it to delete the last owners contacts. The wipe missed one thing : the map locations it was charged at. Likely that included their home.
Ideally there's a standardized wipe feature that really does it.
Ultimately it doesn't strike me as unreasonable for the user to need to wipe their info from their car when they sell/scrap it, just as they need to remove their physical belongings from the interior. (Although I'm sure things could be designed better to make the wipe process easier to accomplish and harder to forget.)