I don't think this forum will ever die. The game is still around. People will always be finding it, getting bored, then staying on the forums for atleast a year or two. As long as this process is repeated I don't think it'll ever die.
Toribash is my only forum I'm active on, out of the two i actually visit often, and I don't think i'll be leaving untill i'm considered an oldfag >_>