I wouldn't go as far. Forum software is notoriously annoying to configure securely and to maintain.
> you get solid support for comments
... at the price of people having to create Yet Another User/Password Set, and likely bother you at some point for user-admin tasks.
You definitely keep control of the data though, and some people really like forums.
I'm not familiar with setting up forum servers specifically, are they difficult to setup for just one user? I can totally see how having proper authentication, emails, caching, etc getting complicated, I'm just curious if it's any user for personal use? Obviously you lose the ability to receive comments though.
Setting a forum up for one user seems like a big waste of time, when there are plenty of perfectly useable blog engines out there that are simpler and more secure to run. Unless, of course, one is already an expert in a particular forum engine.