However, you always have the non-technical people who create complete nonsense topics instead of using a matching existing one. And also some disorganized engineers who continue off-topic discussions for dozens of messages.

Switching to a suitable topic when the discussion gets carried away could probably get more user-friendly support. You can edit the topic of existing messages, but there is no completion for existing topics and there is no clear indication of what got moved from where by whom and no simple undo if things go wrong.