Considering that it has been over a year now since halcy shut down tanasinn.info, and even longer since he announced his intentions, and no one bothered taking action over it immediately, I'm assuming that modern day DQN simply lacks interest in wikis.
The utterly impotent response over tanasinn.info shutting down almost astounds me. If the fate of the original received such an apathetic response, I don't see a new wiki starting from scratch faring any better. There might simply be no one left who cares.

Also, why Dokuwiki? Most of the old articles were written with Mediawiki in mind. There's no one left willing to write new articles, why would there be anyone willing to take the time to fix hundreds of old ones to work on new software? And if we start from scratch, why not go the full way and use something a bit more unique than either of those scripts? At least then it will be a dead wiki with slightly unique software choice.