My simple question to you is: why do you think that?
Shipping a mobile operating system is an impossibly complex task, but surely you can understand a parallel with a simple application: just because you wrote an app that's being successful doesn't mean you're ready to open source it the same day you release it. Maybe you want to clean it up, or refactor it, or make it easier to be reused by the open source community.
My simple question to you is: why do you think that?
Shipping a mobile operating system is an impossibly complex task, but surely you can understand a parallel with a simple application: just because you wrote an app that's being successful doesn't mean you're ready to open source it the same day you release it. Maybe you want to clean it up, or refactor it, or make it easier to be reused by the open source community.