ISOFIX doesn't define high end it is just the name of the European standard. The US decided to go with a different standard called LATCH. Britax is high end, an

ISOFIX doesn't define high end it is just the name of the European standard. The US decided to go with a different standard called LATCH. Britax is high end, and the Marathon is their largest safest seat, and it weighs 19.5 pounds. https://us.britax.com/car-seats/marathon/https://us.britax.com/car-seats/marathon/ https://us.britax.com/car-seats/marathon/https://us.britax.c... So maybe in Europe you are going to have a harder time with self driving cars because you need heavier car seats, but you'll probably find a workable compromise. Yu can just build your base into the center seat or something.