Back to Porsches - they made an acceptable but massively flawed car 50 years ago, with the main achievement being relative affordability for x performance. And in the stereotypical German manner, they have diligently worked hard at improving the car, or at least reducing the fact that it's a shit way to build a car in the first place.
Normally, the Germans do manage to engineer character and 'fun' out of cars pretty well, but the Porsche was such a flawed concept they've merely been able to make it "nearly as good as most other cars", and so it retains a certain amount of character which (I admit) most modern cars lack.
That doesn't mean the layout was a moment of inspiration or genius. It doesn't mean it's the best car ever. Popularity doesn't equal brilliance.
I'm for a good simulation of an Porsche, but there are so many better cars that would be more fun in a simulator first.