Given that we all knew this would probably happen. I don’t think this makes much difference.
I also don’t know if that’s a rule or a courtesy sometimes given to not be an a-hole. There has to be some level of collegiality I suppose between managers even though they are opponents.
Given the saying that the people you meet on the way up are the same people you meet on the way down there’s a practicality to things like this.
Given that it’s easy for me, sitting in the cheapest seat of all in my own house, to demand a take no prisoners and burn every bridge approach, in the real world this usually comes back to bite you.