The other issue is that modern cars are designed differently because of safety concerns—they have less interior space for the same exterior width. Plus kids have to use car seats until they are much older than they used too. Try putting 2 kids in car seats in a subcompact with a tallish driver with the seat pushed back.
Btw I’m 6’5” and it’s tough to even find an intermediate SUV where my knees fit comfortably.