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That's true when Apple has alternative suppliers, ie graphic cards when nVidia blabs before a presentation.

But who is going to replace TSMC? Sure someone will in 15-20 years, but for now...

they have used Samsung before...maybe with middling results but if push came to shove, Samsung's fabs have been the backup I think.

You could've said the same about Intel at one point, but here we are years later.

2011 article, so GP's timeline fits.

It's not a 2011 article. The alleged statement by Tim was made in 2011.