Generally it seems things that benefit from super wide simd also benefit from threading. If productivity apps want to leave performance on the table, so be it.

Generally it seems things that benefit from super wide simd also benefit from threading. If productivity apps want to leave performance on the table, so be it. But really I think the entire ecore/pcore split for avx512 is academic, as I'm not sure tying features and flexibility to wider registers makes sense even on pcores, as I'm not sure the hardware area cost is worth the benefit. I honestly wouldn't be surprised if newer architectures don't have the wider registers options on even their larger cores. You're chasing a pretty small market IMHO of people who have datasets large enough to benefit from large registers and wider alus, but not so large it's worth it to pass it over to an even more specialized accelerator. The benchmarks that tend to show 512-wide simd benefits may get even bigger benefits from running on a GPU.