I am trying to change the habits of forum users who are familiar with a really messy tree structure to the more common flat structure.
The forum is to get a relaunch but without shutting the old version down, so there are two completely different approaches to design and usability but they share the same database.
My problem is how to maintain the tree-like view/function but gently push the user into using the new flat structure. No more hundreds of child threads etc.
First ideas were something like number references between postings but this tends to be really confusing.
Any ideas? Or similar cases?