Well I've been an online FoLC since early 1995, in the middle of season 2.
So yes - I think it is safe to say that I would probably still be here.
But I do think the FoLC community would be considerably smaller, especially considering that season 3 is where the show gained its strongest following!
BTW, fanfic is what got me through the summer of 1996 more than anything! Like many FoLCs, it was my LIFELINE for that entire summer!!
So while I might not have been as into fanfic had there *not* been a New Krypton arc - I'm sure I'd still be reading it all the same!