I totally agree — most C/C++ developers with 10+ years of experience have built similar thread pools or allocators in their own codebases. I’d include myself and a few of my former colleagues on that list.

That said, closed-source solutions for local use aren’t quite the same as an open-source project with wider validation. With more third-party usage, reviews, and edge cases, you often discover issues you’d never hit in-house. Some of the most valuable improvements I’ve seen have come from external bug reports or occasional PRs from people using the code in very different environments.