[jhenkens]

Would be great if the US could have something like the Multimac https://www.multimac.com/home

[bombcar]

https://diono.com/ Is moderately close

[ponector]

This still is for a huge car. If you need to carry two adults and 3+ kids - buy a minivan. Easy solution.

[alamortsubite]

According to the fitment page, the 4-across model fits in a Corolla. I think it's unfair to call a Corolla "huge" in the context of the U.S. market, and it's certainly a lot smaller than a minivan.