[Rebelgecko]

(Disclaimer: I haven't written assembly for a while so this may not be true any more)

One cool thing about ARM is that vector instructions run in parallel with the regular CPU pipeline. You can do some neat optimizations where you interleave sequential part of an algorithm runs while the SIMD instructions are executing. However if you do this yourself the code is going to be super non-portable. In general, knowing that something is always going to be running on a Switch lets you dig deeper into architecture specific optimizations, since x86 has so much variance it would take a ton of effort to really dial in performance on the whole menagerie of Intel and AMD CPUs