.NET 8 includes support for AVX512. HardwareIntrinsics.GetFullInfo should factor that in:
https://github.com/dotnet/BenchmarkDotNet/blob/master/src/BenchmarkDotNet/Portability/Cpu/HardwareIntrinsics.cs#L45-L91