I guess it depends on the forum. On usenet, many threads would last for weeks, if not months. The reader I used (Thunderbird and its ancestors) would sort thr

I guess it depends on the forum. On usenet, many threads would last for weeks, if not months. The reader I used (Thunderbird and its ancestors) would sort threads based on which one had the most recent reply. Given the indexed view of the thread, it was pretty easy to find the new replies and continue existing discussions.