Edit: A quick look at this, and yes, I think it's a bit oudated re airbags. They were taken into account however the systems that were prevalent or even proposed were pretty primitive compared to today.
A quick google gives this5.2 Causes of Head Injury
The most common sources of head, face and neck injury inside the vehicle were from contacts with the steering assembly, door and instrument panel, the roof and side rails as well as from the side window..........the roof was a surprisingly common source of severe injury to these occupants, even though a small number involved roll over collisions. The roof was the second largest cause of severe brain injury........
https://tech.hyundaimotorgroup.com/arti ... g-is-born/
5/8/2020.
Part of the blurb
Somebody oughta tell Monash about that!Q. Where did you first get the idea from?
Usually, automakers develop most of their safety features based on the guidelines of the National Highway Traffic Safety Administration(NHTSA), Insurance Institute for Highway Safety(IIHS), or The European New Car Assessment Programme(Euro NCAP). The Roof Airbag, on the other hand, is an evolutionary technology that no one has ever thought of. After conducting a safety assessment on roof airbags, Hyundai Mobis figured out a roof airbag can protect passengers by covering the entire ceiling of a car when a car is overturned.