AVX512 is not just about width. It ships with a lot of very useful instructions available for narrower vectors with AVX512VL. It also improves throughput per in

AVX512 is not just about width. It ships with a lot of very useful instructions available for narrower vectors with AVX512VL. It also improves throughput per instruction. You're not hand-writing intrinsified code usually yet compilers, especially JIT ones, can make use of it for all sorts of common operations that become x times faster. In .NET, having AVX512 will speed up linear search, memory copying, string comparison which are straightforward, but it will also affect its Regex performance which uses SearchValues<T> which under the hood is able to perform complex shuffles and vector lookups on larger vectors with much better throughput. AVX512 lends itself to a more compact codegen (although .NET is not perfect in that regard, I think it sometimes regresses vs AVX2 with its instruction choices, but it's a matter of iterative improvement).