SIMD has been somewhat of a massive failure in this regard. Unlike threads, most languages seem to ignore its existence and abdicate its usage to the sufficiently complex compiler.

I wish there was better author time feedback to the developer on where they're getting such a perf boost. As far as I'm aware there's no popular linting or blue squiggle to guide you in the right direction.

In games it seems like the popular pattern is to rewrite everything entirely in an entity component system framework.