[leucippe]

Registers will keep growing. Rather than adding 512 bits to the spec, it's better to choose an abstraction that's portable across hardware, so that modules don't need to be recompiled every few years with the latest and greatest SIMD size.

There's a proposal called 'flexible-vectors' which is still in stage 1 (i.e. design phase). Its goal is length-agnostic SIMD.

https://github.com/WebAssembly/flexible-vectors