I would like to put it to a Vote that 90 Day Old Posts & Older
go into a Archives Section
if it does not have any traffic after 90 days.
If the Topic is being read & members are adding to it then it is a - Live Topic.
If the Original Author wants to keep the Topic Alive, then they can re-post the Topic again.
This would allow for Hot & Current Topics
for members to get Involved in more.
Just my opinion