Evidently it's possible to turn a post into a wiki. This is an example. All users should be able to edit this post instead of replying to it. This is supposed to be good for things like lists of links, tables of content, and so on.
This link clarifies what wiki links do and don't do. But think of it as a shared page that pretends to be a topic. As an example, here's a list of things we might want to do during the standup of the new site:
site cleanup tasks
- remove the "about XXX" posts from low-frequency categories
- add meaningful about posts to the others
- do we want to revisit the site hierarchy?
- new badges
- more theming
- planet integration
- social media forwarding