[exDM69]

I will respectfully disagree with your statement, with the caveat that I mostly dabble in arithmetic with 128b/256b float and int vectors.

Using C or C++ with vector extensions (Gcc/Clang) or Rust (nightly) std::simd is very easy and you get code that is portable to different CPUs and ISAs.

But most importantly they have a zero cost fallback option to CPU-specific intrinsics when you need them. An f32x8 can be passed at zero cost as __mm256 to any core::arch::x86_64::__mm_intrinsic (or xmmintrin.h in C++ land).

You gain portable arithmetic and swizzles and SIMD vector types, but lose nothing. Not having to write everything for x86_64 and aarch64 is a huge win even if doesn't quite cover everything.

Additionally you can use wider vectors than your hardware supports, the compiler is able to split your f64x64 to 128, 256 or 512 bit registers as needed depending on the compile target.