This was attempted, but Muut would not export the old forum with usernames and e-mail addresses, because Muut allows integration with third-party services. Thus, you could get usernames, but they could not be restored by the user because a new password - which, naturally, Muut would never export - had nowhere to be sent. Staff would have to manually set the e-mail address for each user.
And retaining usernames would then in effect lock them, because manually recovering accounts is not realistic with the amount of users registered with the Muut forum. The other alternative (which is not necessarily possible) would be to create some psuedo-user like “Muut-Bleutzinn”, but this would just create a whole lot of accounts that would never be in use.
I agree that the forum is an important knowledge base, but after thorough testing by rhuk and discussion between the staff, this is as much as could be gotten from the Muut-forum. Thus I would advice that people use the search-function, and if they come across an important topic they wish to discuss further just link to it and continue the discussion.
Since usernames are generally the same here, matching user to user is easy, but the process is time-consuming. The Muut-forum had more than 18.500 posts, and the ownership of these will not be reassigned - it is simply too much work with very little benefit.
Important as the content of the old forum is, it is all actually here with titles and content, just not with proper usernames because it was technically unfeasible. There is nothing preventing us from continuing previous discussions in new topics, just referring back to the archived topic.