I think the economic, military and political power behind NATO would consider a military confrontation that might escalate into a third world war if they determine that without such a war world events would lead to an existential threat to there existence.

A four or eight year Detente between the United States and Russia combined with an integration of Eurasian defence strategy could see a dramatic obsolescence of an organisation that is no longer politically relevant nor operationally capable to fulfill its mandate.

Currently both of those trends are moving forward.