Unfortunately it doesn't. The newest and hottest way to do this is to either use bespoke matmul from System.Numerics.Tensors or at least using Vector<T> for SIM

Unfortunately it doesn't. The newest and hottest way to do this is to either use bespoke matmul from System.Numerics.Tensors or at least using Vector<T> for SIMD (which is trivial and not "the last mile" optimization it often seems to be).