Yes, it took me a little while to get around to writing this: Stargate SG-1 has been cancelled. It made it to be the longest-running sci-fi television show in the US, which is a real accomplishment and something to be proud of.
Do I think the ratings drove the cancellation? Yes, but not in the way so many other people do. I don’t really think Sci-Fi necessarily said “the ratings dropped–punt it”. I think the folks involved said, “this is a sign that maybe it’s time to go out on a high note, before we have to start messing with the formula too much and potentially making things not good.”
Am I going to miss it? Do I think it sucks that it’s going away? Hell yeah. But from a story perspective, I also think it’s the right thing to do. I much prefer to see my favorite shows end gracefully than to watch them sink into senility and turn into something I’d rather not watch. I feel as though SG-1’s story has been told at this point. They could probably find a way to make it keep going, but it wouldn’t be the same, and I don’t think it would be as good.
Besides, I think they can take this opportunity to widen Atlantis’ scope a bit. This will allow Atlantis to play more with Earth as a setting without having to worry about stepping on the other show’s toes. And the Sci-Fi channel has already said they plan to move some of the actors over to Atlantis.
So, yes, I’m disappointed. But I also think they probably made the right decision.