Hey @Destai. I think that is a fair question.
Currently, we are not specifically going through and closing threads by a certain date. Hence the thought behind an auto-close function. Rather, closing a thread currently depends on the thread topic's benefit to the community and the time between activity, when determining if it should be closed. (There are exceptions to this and are addressed individually.) But for a rough estimate number, about a year of inactivity would warrant a thread to be closed. Again, we want to stress that this is not a strict rule, as many of these situations could change depending on context of the conversation.
@amapola76 Yes, we are considering everyone's feedback here. To be clear, no decisions have been made. It's just something that has been on the idea board, hence why your feedback is important here. Plus, there are a few other items that need to be addressed first. Just wanted to chime in with thoughts since someone brought up the topic.