I can agrea on that one. However, it might be usefull to clean some boards manual like the database report board for example. For the Q&A board there is just no hope :p Still I think there are still some topics left that we need to keep because their is an discussion or information located to. We could write down the thread id from the topics that need to keep so can can move them back afther the action.
I also think it would be usefull to hide the archive board. I can do this with some css if it's located in an class.