I would expect the standard library of various languages to provide an optimised implementation such as this. Then everyone downstream benefits, and benefits from future improvements when compiled for a newer version of the language / executed under a newer version of the runtime.

You see this in rust, where they replaced the hash tables many years ago, the channel a couple of years ago, and most recently the sort implementations for both stable and unstable sort. I expect other languages / runtimes do similar things over time as well as CPUs change and new approaches are discovered.