Slowing down a bit there, eh Ron?
We can go on and on about the mucho muy goodness of the Cobra (Buzz...that was damn near a Penthouse Forum letter
), and all of it is true.
Seems to me, though, that probably the biggest factor for taking it from lust to actually building one is the simple fact that it is...well...simple. It's easy to source parts, it's simple to maintain (it's a damn Ford...any NAPA will do) and it's easy to work on. Of the other replicas, the Speedsters come closest, being not much more than a Meyers Manx in execution, but the dwindling access to aircooled VW-type stuff may have taken a slight toll.
...and frankly, in these days of commie-pinko-enviro influences on our daily lives, it's just slightly nicer way of flipping the bird to all that has been wrought.