No. This is just a messageboard. Bitcoin is bigger than a forum. There are plenty of other discussion boards and if bitcointalk did go down for good (not sure why it would) then another would just rise up to take its place.
yes you are right there are many more places to discuss and talk but the reality is the people are getting paid here for the discussion and that is the reason people are very much active on this forum if there would be any other place where people would earn more they would switch over there.