[Eljaro]

Besides many reasons listed here (money, wife, friends, etc) I think that many have not really experienced the Cobra performance to its fullest and so do not know the ultimate satisfaction it provides.
Racetrack is ok but you have to get there. Much better is the empty curvy roads close to where you live where you can go any time and where you can really slam it and accelerate through the gears to the rev limiter. I mean really go fast.
I admit,that is uncivilized, illegal and also dangerous, but that is what makes for the real Cobra experience. Many are unadventurous und just wont do that.
You need to have driving skills to fully exploit a Cobras potential, and many just do not have that nor the experience of handling really fast cars.
Many also don't keep their Cobras long enough to get to know it and to master its handling. Many also get afraid of the monster they have, because a Cobra is a Monster you have to drive with respect.
I have my cobra for 20 years now and its a keeper. Until I am too old to drive it.