9 and 3 is more practical than it used to be because everything has power steering and steering ratios have been reduced. Back when people were writing roadcraft manuals, steering gear reduction was higher, to reduce the amount of effort needed to turn the wheel. That meant you had to turn the wheel further to reach full lock. My mother’s Triumph Acclaim (a rebadged 80s Honda Accord) required two full turns to reach full lock; I can’t remember a car I’ve driven in adulthood which required more than one rotation. An early model Jeep Cherokee, maybe.