I'm not arguing it, I'm just saying it's a fool's errand. If you build your own chip, you have to build your own mobile stack, and then maintain it and enhance

I'm not arguing it, I'm just saying it's a fool's errand. If you build your own chip, you have to build your own mobile stack, and then maintain it and enhance it with the newer technologies, so it becomes a mountain of technical debt while your competitors can take what Qualcomm gives them and roll out a phone. This assumes that Apple will maintain it's location as the top of the phone line and won't get eaten by someone else, if they slip, that mobile stack becomes a liability.