I’m not smart enough to know, but my guess is that there is so much inefficient interconnection between components that it’s worth the effort for Apple, et-al t

I’m not smart enough to know, but my guess is that there is so much inefficient interconnection between components that it’s worth the effort for Apple, et-al to become supply chain specialists. For example with the M1 they didn’t just make a CPU they made an SOC that reduces the need for a heatsink and all the supply chain costs that go with it. If it were a simple one to one swap, without other efficiency improvements, I agree there is no incentive to take over that responsibility.