A chip manufacturing fab for the kinds of chips Apple needs would cost billions, and will take a very long time to get up and running. It requires a lot of very specialized equipment you can't just buy off the shelf, and I expect someone like TSMC likely has a bunch of trade secrets that make their process work, which they won't just freely hand over. I'd like to see Apple work some agreement with TSMC to set up a modern fab in the US, but I expect that's a long way off.I agree. I'm surprised why Apple has not started manufacturing in-house chips for the iPhone. Imagine how much money they will save. You are talking in billions!