I see when a new subject arises that was dealt some in a previous thread years ago, some people reference the old subject. Would it create a recursive aberration to link these -other- threads back in ?
Con : the annoyance of having the old thread back on top of the list. Worst if someone posts in the older thread again, confusion ensues. Also, it's thread resurrection.
Pro : if someone finds the old thread through internet search and ignores all the new developments.
Me, I am all for doing it because I like to find things when I look for them.