I am not sure about this unless there’s a way of automatically continuing the topic in a new thread with a slightly altered title if the original thread reaches a certain level of posts. For example original thread " What super power would you like". If it gets to big “What super power would you like 2” is created.
That way threads aren’t too long but the topic is open to those who might want to post to an older topic or a new poster coming across such a topic who wants to join in .