If you put all wiki topics in the same category, you could do something like this:
https://meta.discourse.org/t/using-discourse-to-host-a-knowledge-base/34036/9?u=erlend_sh
I also recently interviewed Coinbase and we talked at length about how they balance their Discourse forum & support resources. They’ve integrated Discourse with their knowledgebase so that every article comes with a dedicated topic for comments.