Moving posts? A chore.
There's two ways to move posts out of a thread in NodeBB:
Forking and Moving.
Forking lets you select posts from a thread, creates a new one, and moves the posts there.
You can access this functionality from the topic tools menu at the bottom of the topic.
(side note: Move Topic has nothing to do with moving posts)
Choosing Fork Topic opens this dialog:
You enter a title for the new topic, select posts from the existing one and hit OK.
You can not move posts to an existing topic from here.
Moving lets you move a single post from a thread to a different, existing thread.
You can access this functionality from the ellipsis menu:
This opens the following dialog:
Unlike Discourse, you can not search for topics by name here! You have to manually look up the ID in another tab.
Splitting posts off a topic into a new one works okay. But it doesn't have a numeric input or a select+replies feature which would be useful to move major derailments.
Moving posts into an existing topic is such a chore that it is probably never worth the effort. You have to move every post individually and look up an ID manually.
And I completely forgot to mention that this applies to the Move command: