"The Default Width Problem" -- this section seems confused and definitely reeks of LLM authorship. It's comparing -march=native against std::simd and complainin

"The Default Width Problem" -- this section seems confused and definitely reeks of LLM authorship. It's comparing -march=native against std::simd and complaining that std::simd<T,8> breaks portability with pre-Haswell. This is a real issue, but -march=native is no better! It bakes in the SIMD width at compile-time as well, so that binary also won't run on a pre-Haswell machine. It's a real issue but neither side solves it. You need runtime dispatch (a la Google Highway) to solve this.