The banner for controversial posts that was recently introduced says:
Controversial Post — You may use comments ONLY to suggest improvements. You may use answers ONLY to provide a solution to the specific question asked above. Moderators will remove debates, arguments or opinions without notice.
It says that the comments will be removed. The question is: Should such comments be removed by deleting them, or shouldn't they rather be moved to the chat?
By default, there is a message saying that "Comments are not for extended discussion; this conversation has been moved to chat", but in a recent post, the comments - although relevant for the topic - did not seem to be "moved to chat", but simply deleted. A moderator recommended to "raise the issue about comments on Academia Meta", which I'm doing now...