I'm the dev of Gaius.jl. I'm not sure it will ever end up Julia's Base, but I think of it as a prototype implementation that might inspire (or possibly evolve into) a real implementation that could end up being bundled in the language eventually.

Julia really does have the tools to solve this problem natively, and they're maturing quite a bit more quickly than I ever would have guessed a year ago.

Last year if you had asked me I would have predicted the development of something like LoopVectorization.jl as appearing maybe by 2022 or something. Instead it's here now, albeit with a lot of work ahead to make it more robust.