I don't want to be too much of an ass, but we did get five
seasons of Atlantis and ten
seasons of SG-1. That's a total of more than 300 episodes. Add to that two DVD movies (and now a third movie finishing up Atlantis, and possibly a fourth movie dealing with dangling SG-1 threads) and you have at least 310 episodes worth.
And as much as I'd like to make fun of Mansquito, it was just a TV movie. And any series as bad as that (Flash Gordon, Painkiller Jane) has been canceled after one season.
It's not like we haven't gotten our share here.
Besides, we'll probably get all that in a series of DVD movies with a bigger budget and (hopefully) none of the filler anyway.