It would be nice to have a category about this very forum, how Discourse is set up, features, add-ons and possible issues.
I was creating a new topic exactly about this when I found out this topic.
As you said, I think it would be great to have such a category, to discuss about the forum itself.
Other Discourse-based forums have it, such as:
I would like to be able to change the language of the forum for user, to add the “Solved” option and so.