I tried to make the GH Wiki work and managed to address 6 of the 7 concerns brought up in the article using a GH Action to mirror a directory of docs. It was my first GH Action and proved to be trickier than I thought. For those who just need to expose some markdown and don't want to bother with gh-pages you might find it useful:

https://github.com/super-productivity/super-productivity/blo...

The generic-ness of the wiki wasn't an issue for me as I only intended on using it as a temporary measure to build up the bulk of the content and coordinate with the main dev on finding a balance between the flashy website with its guides and the less flashy docs. gh-pages is the obvious next step of course.