> Yes, but it wouldn't necessarily be easy to use or consumer friendly. The ideal solution would have the baby with their back facing front, and the attached carrier facing inwards towards the seat.
There is an existing international standard (ISO 13216) for child safety seats in cars:
I got anecdata of people shopping for gargantuan 3-row SUVs so they can accommodate the third child seat. Most people don’t seem to mind as it’s “only” a monthly payment. (Over 8 years it’s a fortune in interest let alone the actual cost of the vehicle but most people don’t think that far ahead)
To add my and data as someone who recently got a third child: number one question i get askes is whether we are going to move (we live in an apartment in the city) number two is a comment about cars size. So I am pretty sure people consider this when they think about having another child.
There is an existing international standard (ISO 13216) for child safety seats in cars:
* https://en.wikipedia.org/wiki/Isofix
It could be added to airplanes seats.