Apple doesn't have to build it's own CPU, but often vertical integration gives one a significant advantage. TSMC is slave to Dutch ASML, whos is the only one o

Apple doesn't have to build it's own CPU, but often vertical integration gives one a significant advantage. TSMC is slave to Dutch ASML, whos is the only one on the planet who can make the EUV lithography technology TSMC uses to make the latest chips.