What if people start replying to these old threads, simply to go "LOL, funny" and then all the Recent Topics area is full of ancient threads that have been bumped but aren't really relevant anymore?
Do people get so bored that they have nothing else to do? Why not start a new thread, try thinking up some ideas to contribute to the Amiga community, or read someone's post asking for help, do some research online then come back and reply to that person, helping them out.
I'm sure there's heaps of valuable information lost in those older posts, but the best way to get to it isn't to start pulling them out of the box randomly. If there's something specific we need to find out, there's the search function. Searching for something specific, finding it, reading through the thread and replying to it because it's the topic you were looking for in the first place seems more productive.