John
Thankyou for you're explanation. It is my understanding the JSF while the next generation of plane, is to be used by all the Forces not just the Airforce. This means it is a one size fits all, and obviously does all the jobs well.
Using you're car analogy, does this mean we will have a plane that comes as is, in any colour as long as its black? After all car companies are moving towards less and less choices of model, back to the model T.