That used to be true for original EPYC but might not be true for Rome (outside AVX-512 workloads). IMO it's more due to continuous Apple + Intel collaboration a

That used to be true for original EPYC but might not be true for Rome (outside AVX-512 workloads). IMO it's more due to continuous Apple + Intel collaboration and supply chain, AMD not being able to supply large market (they share TSMC with Apple for their CPUs), and overall unknown situation for AMD (will they stick with what they do now or abort?). If AMD just matches single thread performance of 9900k, there's not much point in switching. And Apple already uses their GPUs anyway, even if NVidia is still much better.