And it sometimes takes months to get things fixed (after reporting or providing PR at https://github.com/mdn/content).
I've learned to always test myself when it comes to pesky/obscure behavior(s) of JS.
The OWD team writes technical documentation on APIs, HTML, and JS. OWD also works on information architecture and browser compatibility data. They contribute mainly to https://github.com/mdn/content/ and https://github.com/mdn/browser-compat-data/.
Mozilla, not OWD, is responsible for Yari, the platform behind MDN Web Docs (https://github.com/mdn/yari). The MDN blog, ads, AI and design, the MDN infrastructure, are fully owned and controlled by Mozilla.
I know some folks who work on this content and TBH it’s the folks we’d want working on this content.
The content of MDN is open at https://github.com/mdn/content, currently a mix of HTML and Markdown but getting transitioned to Markdown. So a different effort could perhaps be made here for a "low-tech" (like CSS2 at most and Javascript-free?) static page generation to live in parallell with the modern pages. It's all neatly organized in a hierarchical structure.
You don't have to trust Mozilla. All written MDN content is licensed as CC-BY-SA-2.5, and all code snippets are either CC0 or, for snippets over a decade old, MIT.
And it's all in Git: https://github.com/mdn/content
So if the Web as a whole ever completely loses faith in Mozilla's ability to sustain the MDN platform, all of the content is licensed in such a way as to make it trivial to fork.
There was even an attempt at spinning out the docs ~8 years ago (https://webplatform.org/), which ultimately collapsed back into MDN.