... in order to prevent two simultaneous chats being created.
Yesterday, I got the orange "Please avoid extended discussions in comments. Would you like to automatically move this discussion to chat?" -box in commenting on this answer. (Sorry, all relevant comments are deleted, but maybe admins can still see them.)
So I started that chat, but the other arguer also started a chat which resulted in two separate chats.
It seems the orange box appears for both parties of the discussion. Sounds logical. But as soon as one of them uses that option, should that orange box not dissappear or change into:
[Other name] moved this discussion to chat. Would you like to follow?
for the second party, to prevent double chats?