You may have had this request before, but I would love to see an feature that would make facilitate continuation threads. At the least having the link to the next thread at the bottom of the preceding thread and the link to the preceding thread at the top of the last thread. Potentially copying the initial post from the first thread or allowing some form of editable pinned post with a summary or the like. Also, potentially, allowing the same poster to remain highlighted as thread starter even if they aren't the one who triggers the next thread, particularly useful for threads about a posters life changing journey when they turn to MN for emotional support and ideas.
There may be other ideas other posters have.
There may not be that many of them in the big scheme of things, but long running threads have a big place in a lot of posters MN lives and they draw people back time and time again. However they are work to set up and maintain well and it would be lovely if MN could help with that.