Thanks for the response. That is the newer forum, which has been active for a couple of years now.
The one I am referring to is the original forum, which has the vast majority of UDK development discussions over the last 10+ years. There is a huge amount of information that is no longer available. If you google UDK dev discussion, most links will point to the old forum, which is now 404’ing.
This forum was set to read-only a couple years ago, after a security breach. The information on this forum is hugely valuable to the continued development of my game, and many others still using UDK.
If you mean the old, archived, UDK forums there are no plans to remove them - I agree that the information is valuable and don’t want to see it disappear.