Exactly what DUke said. Remember all those newcomers that have complained that no one has replied to their posts? Well, often it's because it's a discussion that has been rehashed over and over. Veterans don't post because they've seen it before, but newbies feel ignored.
And of course newcomers don't search for the individual posts. Why should it even occur to them? Their mindset is that they're new, and so everything they say will be new.
But if there was a classic forum, it would be different. It could be at the top. Whenever someone new joined, somebody could post a message that said something like:
"Welcome to the CPA. We'd encourage you to head first to the Classic Forum to check out all of the long-running topics and threads. It includes many of the topics that are often introduced by newcomers. Please, post your views on these topics."
That was off the top of my head, but the idea is about right. Heck, it could be the "Classic Speech," and I could steal it whenever someone new comes.
And as for the "ten day thingie," she means that topics in that forum wouldn't go away after 10 days; that way, they would always be at the top when a new member came.