Most of the categories have dates of closure for the posts. Having old posts with information which is years old can confuse and mislead users.I have seen new users respond to thread which were last active in 2019 or 2020. With the changes in the application and build the information in most of these old posts is not correct anymore. The auto close feature also keeps the content on the forum fresh and up to date. I believe this practice is common across most forums. If there is a requirement to keep a thread open you can ask me and I can do that.