In reply to Lutz's comment about having both feet on the ground and the fact that racing espaces don't compare with road versions.
You may well recall from previous postings that one of my job roles is prototype testing and that often means driving road and race cars on test tracks. For instance the Lotus Exige was born to the roads as a result of omologation rules and Lotus's desire to run a single marque race series. The Aston Martin DB9R has evolved the same way. The Ford GT40, Maclaren, etc etc.
Remember the Renault 5 series one, which had a 2.9 litre mid mounted engine, that again was a born racer let out on the road.
A lot of safety features we take for granted evolved from the race tracks, for example the design of the passenger copartment and the sacrificial impact absorbsion of the crumple zones. Roll bars built into seats on our german sports cars.
If you read the original article you will see the comment that road cars make it onto the race track because they are the best engineered inovations of their time.
The French seem to come up with inovations that sometimes are so far advanced that they don't make sense at the time. Remember the Citreon DS19 and DS21 with steering dipped beam head lights, self leveling suspension.
The mark 1 Jag had a micro fine heated rear window back in the late fifties way before Ford put the inovation in the front of the Mondeo.