The reason they dont, is to most of them its just a nice new daily transport. I love my 07 mustang, but its just a nice new car. Now if and when those cars reach 35-40 plus years old and end up in the hands of enthusiasts restoring them, and enjoying them people will be giving those " 40 year old modern muscle" cars thumbs up, and want to talk about them, or this conversation will be playing out all over again with modern muscle now being the "old car" in the equation.