I admit that at the beginning, when I discovered the principle, I did not appreciate much. After careful thought, I now find that it is particularly well thought out and well adapted for the particular case of forums.
I find that this principle helps to stay focused on the main subject and does not encourage deviations, like a tree with too many branches.
On the other hand, I throw an idea like that, I do not know if it is good but why not display like this directly? (see print screen)
A new member does not really have the reflex to go over the arrow while the information it gives to flyby is very important.