I got the impression that the likes of the Saturn V, Mini Cooper sets etc. were more intended to be "grown up" model sets, rather than a "build it up, knock it down, build whatever you want" kids set.
When I grew up I had all sorts of sets, F1 pit/start line, a castle gate, a chalet house, a boat, a plane, loads of little cars. In the end everything ended up a garage.
Then I got Technic, the incredible black sports car with the suspension, steering, V8 engine, popup lights