Well, no, it's not just SW, but this seems to be a problem with a lot of long-running kids shows today: as we've talked about in other threads before, older seasons of ARTHUR, particularly the first, are rarely, if ever, shown in reruns anymore, and a lot of it has to do with how outdated the technology is depicted in those episodes now: like in "Arthur, World's Greatest Gleeper," Muffy accuses him of stealing her new cell-ular phone, which was roughly the size of a brick and looked like a foldable walky-talky . . . remember those?
I mean, this is one of the reasons why Hooper's Store kept being modernized every few seasons, to reflect the kind of little convenience stores kids might find in their neighborhoods today, as those old little mom-and-pop-esque soda shops of the 50s, 60s, and 70s don't exist anymore (I'm surprised they okayed the new retro Hooper's this season).