...unless a moderator could put a lot of effort into updating it often, and separate discussions could be kept organised and easy-to-follow, in one thread (although, useful discussions could be linked from the sticky I guess).
This.
A forum with this level of activity should be reaching out to its strongest community members to build things like a well-managed sticky thread. Putting together a team and building a management structure is the next growth stage for a web community from here.