I think you have to look beyond 'technical' ability and factor in commercial incentives: like who would be buying these CPUs and how many? Zero chance of an AMD

I think you have to look beyond 'technical' ability and factor in commercial incentives: like who would be buying these CPUs and how many? Zero chance of an AMD or Intel ARM core like this in the near future. Marvell have pulled out of the Arm server market IIRC. Qualcomm a possibility but they have underwhelmed in the past. Nvidia would be my favourite post the Arm acquisition but they probably have their eye on other markets.