User blog comment:Freehugs41/Falling./@comment-1756703-20100307231448

I don't know about the others, but the only reason I haven't been as active here lately is simply because of other priorities, such as schoolwork.

Given that we're in between seasons right now, it may simply be that the wiki is going through a lull in general activity as a result, and thus some users feel that they see no reason to socialize or contribute positively right now. This is just an assumption, though; I can't really speak as to why everyone who has left has done so.