is far more complicated.
Samsung Austin is staffed with US personal and they (Austin) will do anything to make Apple successful - Samsung Austin is competing with Samsung in Korea - it's very common for have fabs to compete for capex.
A lot of Apple fools were excited TSMC replacing Samsung - because they think Kimchi is going to steal Apple secrets.
Apple will do a lot better sticking with Austin than going with TSMC.
Austin will fight to keep Apple business -
and that's bad news for TSMC
remember ARM foundries will dog fight over ARM business
Nenni now has become a disgrace to the ARM eco system - a complete liability (a lying piece of dog guano)