Intel also had KNC instruction set (AVX512-like) on Xeon Phi (these CPUs available on PCI cards). They abandoned it in favour of good old x86. One of important

Intel also had KNC instruction set (AVX512-like) on Xeon Phi (these CPUs available on PCI cards). They abandoned it in favour of good old x86. One of important factors was the difficulties related to tooling, especially necessity of cross-compilation.