Because this was a huge turning point ep, one where it came very close to jumping the shark by introducing magic powers. People start watching the series, going along like normal, then suddenly - WHAT THE FUCK, LASERS ARE FLYING EVERYWHERE AND PEOPLE ARE SUPERHEROS. Some people like it, I suppose, but the vast majority probably pop on the forum to see if this ever goes away / see what the hell is up with it.
It's right when the series went Sci-Fi crazy for a brief period of time and also fell off in popularity with the mainstream audience.
It didn't even come close to falling in popularity...as a brief reminder, you and your two friends does not=mainstream.
The majority of these forums do want it back for the record, read a few posts and you'll quickly see that.