The biggest reason to do this is because TSMC's N2 node and future nodes will be dominated by AI chips. Since AI chips have far bigger margins than most Apple chips, Apple will get outbid by companies like Nvidia, AMD, and Broadcom. Nvidia already became TSMC's biggest customer last year. Every TSMC advanced node from N5 to N2 is fully booked and running at max capacity.
It's not really realistic to make Mac, Watch, iPad chips on TSMC's best node in the next 3-4 years - assuming there is no collapse in AI. Unfortunately, this might mean we will get inferior Intel chips for our Macs. Intel nodes, as it stands, are far more power hungry, less dense, and lower yielding. Intel's own Panther Lake CPU tile is on 18A and it's extremely disappointing in terms of perf/watt and raw perf.
I still expect iPhone chips to be made on the best TSMC nodes though. I'm assuming Apple will design every future core for both TSMC and Intel, sort of like how they dual sourced with TSMC and Samsung in the past for the same generation.
It's not really realistic to make Mac, Watch, iPad chips on TSMC's best node in the next 3-4 years - assuming there is no collapse in AI. Unfortunately, this might mean we will get inferior Intel chips for our Macs. Intel nodes, as it stands, are far more power hungry, less dense, and lower yielding. Intel's own Panther Lake CPU tile is on 18A and it's extremely disappointing in terms of perf/watt and raw perf.
I still expect iPhone chips to be made on the best TSMC nodes though. I'm assuming Apple will design every future core for both TSMC and Intel, sort of like how they dual sourced with TSMC and Samsung in the past for the same generation.