No, Chris, you are not crazy. There used to be a Silhouette Roto forum.
We are up to forum #197 and yet we have only 133 active forums at the moment. Over the last four years, over 60 forums have been deactivated. We do not want to be a site like those you find elsewhere where they have 350+ forums out of which only a dozen or so have any real traffic. We work hard to build a site wherein our users can expect to find something of value when they click a link. In some other sites, I have seen forums active which have not had a post in over a year -- well, unless you count admin posts or spam. We do not want to be that kind of site.
The Silhouette Roto forum had languished to the point where people were not posting there and about the only posts in the forum were those of a commercial nature. So we unplugged it.
We have a few "deader" forums but they exist here due to the fact that there is no other place for those remaining users to go when they do need help. That was not the case with Silhouette Roto which has a manufacturer-run forum. So, the general rule is: no dead forums; the exception is we'll keep it in the case of some tools if we are the support arm of last resort -- as long as an expert or a manufacturer's rep is willing to remain on-call so that help comes when needed.
We may add Silhouette Roto again in the days ahead, we have done that with more than a few forums over the years where we retry them later -- sometimes, they work on the second or third try. We'll see what happens.