Reading that thread from FR the format on there is quite hideous...might be the atari 2600 of web forums.
Actually, it has a few software features that other forums lack. They have pinglists so that you can directly address and reply to a single poster or address multiple posters (in the hundreds) to flag them to a thread.
So you can assemble a pinglist for Catholics or Kosovo or nannystaters or Ron Paul or whatever. And anyone who joined that list will see all those pings listed on their My Comments page. The My Comments page lists all posts a FReeper has made and all the replies to it and all pings that their FRiends have made to them, including all the messages and threads that they have been flagged to from a pinglist they have joined.
No, it looks like your dad's BBS forum. But despite the lack of Web 2.0 AJAXy features, it still offers many features that the more modern PHPBB type forums like this one simply do not offer. Here, you do get Quick Posting and a mini-editor so you don't have to write true HTML (too bad) and you can choose color themes and sigs and avatars and other bandwidth-gobbling dreck. But those are issues of style, not substance. The plain FR style forces members to focus on substance, not graphics and avatars and anigifs and other inconsequentials.
Many FReepers would leave FR if other forums offered such features. But no one else does. Many FReepers live on their My Comments page because it is a list of all their interest topics (like pinglists) and all of their comments and replies in order so they can keep a running debate going. The Sidebar feature is also pretty good for Breaking News, Editorials, Extended News. Some other forums like Liberty Post do offer the Sidebar feature but don't have a true My Comments page.
The My Comments and pinglists are the really addictive FR feature. It takes a pretty considerable amount of database server capacity to offer these features under heavy load when traffic spikes the site. That is one of FR's real features that are hard to match. I suspect that FR's software scales better than the forum software here at RonPaulForums.com.
Just because FR's so plain-texty doesn't mean it lacks features. In some features, it is still ahead of almost every forum software on the internet. Sure, they banned me for supporting RP but I won't deny that they do have their attractions which is how they have held onto so many people over so many years. They like the format and they like the forum features.
FR would lose very few of its FReepers if it weren't so heavy-handed in the speech allowed there. For instance, all the folks they lost over open-borders vs. closed-borders and amnesty vs. enforcement. Or more currently, supporting Ron Paul or Romney which is close to a bannable offense. FR's features keep them coming back even if some of these features do have their own downsides as well and require more moderation of the forum.