Fun that you mention that, I happen to run my personal site, as well as another wiki for my Pokémon-related fanwork, and an internal kb wiki on my job, all on Dokuwiki. Used to advertise the engine more on Reddit back in the day, too. And sure it’s quite lightweight and operable (I can edit articles remotely, manage remotely and do lots of cool stuff). Its just, from my experience so far, while it’s extremely well-suited for the workflow of a wiki, it’s not so much for the “post-it note” workflow, not even with additions like the Blog plugin.
Perhaps I have to yet tune it further. I guess it’s time to Do Science.