Well, if you want my honest opinion, I think it's quite natural and logical that all newsgroups died out giving way to forums and other forms of online communications, and I hardly see a point in trying to revive something so obviously ineffective and outdated.
You're not alone in your opinion, although it may surprise you to know there are just as many people who consider it quite effective and not at all outdated. In fact, it may surprise you to find that there are individuals who dislike many things about forums. I don't consider one or the other better; I consider them different. There are other newsgroups, such as rec.arts.anime.misc
which still have thousands of posters and hundreds of topics going on at once. Usenet isn't dead.
Why should anyone bother to wait for hours for their message to show up if they can go to a forum instead and deliver message to everyone willing to read it in milliseconds, or tolearate spam hoping that next one will be stopped by some filters without having any clear guarantee that it actually happens *shrugs*
I said it could. It doesn't usually. Not anymore. The servers are just as fast as any other servers. As bandwidth has increased across the internet, so too has newsserver bandwidth increased. You can expect posts to show up immediately or within a minute or so. No, It's not as organized as a forum, but that is part of what makes it different. It is not a weakness.
The trouble with forums is that they are less anonymous, they require registration, they require moderators and administrators, they require rules. They are usually not backed up. Delete the forum, and you lose the posts. These are weaknesses of forums. Nothing wrong with this set up in certain circumstances. I happen to think this forum is quite normal, and I certainly will enjoy participating in it. However, I think the degree with which newsgroups allow much more... flexibility is still relevant, and effective, and therefore useful. Access is granted from a thousand different points, posts are stored around the world. The community's history is never lost. So, indeed, I think there is value in drumming up content.