It's not 'closed' vs. 'open', it's business man vs. engineer. Apple has a few core development projects they offer for free. Darwin and Webkit to name a few.

It's not 'closed' vs. 'open', it's business man vs. engineer. Apple has a few core development projects they offer for free. Darwin and Webkit to name a few. The root issue is: Steve Jobs would never understand why you would do something that makes no business sense. Linus would never understand why you wouldn't give something away for free if you could.