Perhaps for very small sizes (just use a mov directly) and very large ones (that fall out of your cache, so you’d probably want non-temporal stores). I think it would be difficult to cover all cases.
It'd be great if this were true, since that would finally put an end to the madness. But I've hoped this for many, many years, but always been disappointed when someone spends ungodly hours on some hyper-tuned AVX thing that just barely eeks past, and we get stuck with another unwieldy monster for a decade.
