Apple gives people who want to make use of their beautiful code the finger. Why not do the same to potential Steve Jobs'? If BSD had been licensed under the GNU GPL, OS X would either have to have been built from scratch, or be free software.
So? That doesn't change that Apple usage of FreeBSD codebase is still a net win for the FreeBSD project. It is still a win-win situation even if the win isn't totally symmetrical.
Finally someone that actually understood what I meant. Gaining traction is a lot more important for getting work done than the contributions back from *GPL ever has been.