I wouldn’t count on it. Apple is vertically integrated, but doesn’t do their own manufacturing. It’s not necessary when They can dominate the supply chain and hold a practical monopsony on the best production capacity anywhere. This is why everyone else was lagging to produce 5nm parts -- Apple simply bought 100% of TSMC’s capacity.
The amount of centralization of fab tech is astonishing. You've got all the sub 7nm fab tech that the whole world depends on for the next generation of technology coming out of a few fab plants in Taiwan. Software is easy. Material science is hard. There is one company that makes the machines that the Fab uses. They cost several hundred million each, have a multi-year backlog and only TSMC has really mastered integrating them into a manufacturing process that can scale.
