Thread:Extension talk:LiquidThreads/Redesign/Really wanted?

It seems to me the main argument in favor of using liquid threads is to make it easier for new editors to communicate. While I agree that Wikipedia needs to attract new editors, I still have to question this rationale. I think (and I may be wrong), that a communication system that makes discussion more "forum-like" might be encouring more new editors to contribute to Wikipedia. But I also think it increases the desire to use the system for non Wikipedia related discussions. At the very least, could someone (and yes, this might be called stupidity or ignorance) point out to me the key points that are considered the benefits of this new system?