Well, if it wasn't because of it reaching the post/page limit, then it's likely because the OP requested its closure. Anyone who starts a thread can request us to close it. Since the member who starts a thread is its owner, this is a long-held right we've followed. We don't ask why and don't need a reason to close a thread when such a request is made to us. Especially for a thread like this, where anyone is welcomed to start a new one on the same topic.