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Re:AMD EPYC “Rome” Server Processors to Feature 8 to 64 Cores by stcredzero on Thursday June 20, 2019 @01:27PM (#20235096)
Since they control the hardware, Apple probably has invested quite a bit into hardware specific optimizations that won't readily port to AMD chipsets.

It's in Apple's history to be able to move on from hardware. It's also in their history to make the wrong choices, necessitating the move.

Re:AMD EPYC “Rome” Server Processors to Feature 8 to 64 Cores by ufoolme on Thursday June 20, 2019 @02:02PM (#20235481)
money is they’ll move in next 5 years to at least partial move to their own ARM chips, they already have to a degree.
Re:AMD EPYC “Rome” Server Processors to Feature 8 to 64 Cores by Narishma on Friday June 21, 2019 @05:05AM (#20240988)
People have been saying that for the last 5 years if not longer.