A proposal has been placed that an additional rule should be added that once all threads come to their natural conclusion, the moderators should lock the threads, preventing further contributions. Once the thread is locked, further contributions will go into a new wiki article.
Pro: This keeps threads from wandering off on tangents, keeping the board tidier, and keeping the threads on-topic
Con: This prevents a thread from acquiring new information, contributions and further questions down the line, particularly when a new user finds an old thread but needs further clarification. It also stops threads on subjects that continually develop over time, like the zwave driver and javamo threads.