There are other non-Pit threads that get resurrected from time to time, often with the word “On-going” in their thread titles. That long-running On-Going General Aviation thread, for example.
Others have been very long-running but eventually peter out and get forgotten, like that long-running Dating Thread a while back.
Sometimes they end up getting closed. That semi-infinite thread about the value of 0.999… finally got closed after All Of Shakespeare’s Monkeys had typed out all possible words on the subject and a somewhat trollish newcomer jumped in.
In that thread, I posted a little essay questioning whether a thread that is 99.999999…% complete can ever be considered 100% complete.