> We used to go on long trips with a family of 5 in normal sized cars regularly. Of course I would never do that today.
Of course you won't - the baby seats that are safe enough to pass regulations are too large to fit 2 of them into the back seat of that old normal sized car.
Long family trips in smaller cars were done without baby seats or booster seats.
What??? You're saying you can't fit two car seats in the back of a "normal" car? I have two of them in a Honda Jazz (aka Fit) at this very moment. A car classed as a "subcompact". Until recently, one of them was a bulky Axkid (though it has since been outgrown).
Of course you won't - the baby seats that are safe enough to pass regulations are too large to fit 2 of them into the back seat of that old normal sized car.
Long family trips in smaller cars were done without baby seats or booster seats.