Large portions of it can be attributed to fuel economy and safety requirements (ironically the “dangerous” safety requirements are tied to people unwilling to wear seatbelts).
Fuel economy tends all vehicles to the same aerodynamic shape (similar to how all big planes look quite similar), and safety is requiring airbags (which protected unbuckled passengers) in the side pillars and elsewhere, making them larger and larger.
Fuel economy tends all vehicles to the same aerodynamic shape (similar to how all big planes look quite similar), and safety is requiring airbags (which protected unbuckled passengers) in the side pillars and elsewhere, making them larger and larger.