Are parents with 3 young children supposed to change their cars? Looking at some of the guides for cars they classify most cars as being able to fit 2.4 child seats, so in that case, they are either going to run 2 cars or buy a bigger monstrosity like these 7 seaters.

The suggestion of better rear seating or at least the option to have child specific restraining as standard should not be that costly to manufacturers. I have seen a few car models that do offer build in child seats as an extra. However alas these are really in the minority at the moment.