> To some extent that was Stack Overflow
Yup, that was always very much the plan, from the earliest days. Shame it soured a bit, but since the content is all freely reusable, maybe something can be built atop the ashes?
There is https://grokipedia.com which encourages you to suggest an article and you may submit improvements to an existing article.
There is https://grokipedia.com which encourages you to suggest an article and you may submit improvements to an existing article.