I don't think it's about to keel over, but it seems like it's well, kinda been on life support the past few years. There's still a lot of hosted comics running here, but a large amount of hte people who used to be around are gone. That's people from all levels- comic writers, comic readers, and the people who have authority and access to the workings of the site. I'm not really exaggerating when I say the community has been pretty much decimated.
Even if my comic isn't updating here anymore, I still come back here to talk with everyone on the forums and read other people's comics. Unfortunately there are things I don't like about the hosting here (and not all of them are things that can be "fixed," I think most of htem are probably just personal preferences I've discovered over the course of time). For me, it's not a valuable use of my time to update the coding of my other site and then come over here and do it all over again (partly from scratch because there's some incompatibilities between the two) when this site gets the number of pageviews/visitors a month that my other site might get in a day or two. Admittedly this is partly because I am a vain asswipe.
I, too, am very grateful for the start I got here. God bless this poor abused site and how it had to put up with the abominations I had uploaded early on in my days here
It's been great for me as an exploration of my artistic abilities as well as my shallow foray into the land of web design, but it no longer is able to provide everything I want out of a comic host service.
I might feel differently if the community were still as active as it used to be (even just "active" as it was when I first lurked around here in late '08), but it honestly feels like a ghost town most of the time, and the fact that there are usually more active spambots than actual posters is disheartening. I'm not sure whether the spam drives away noobs, or the lack of noobs makes everything ripe for spammers, but I suppose it's become a self-perpetuating cycle by now.