Let me put it another way. If the vast majority, but not the supermajority of consensus witnesses had upgraded but there were a few who were uncontactable after repeated attempts, they would be out. I say this partly because our 'original' top 30 or so were so tightly bunched that one whale vote had the potential to make a difference.

This could be a moot point and not actually what happened over a tron, but i don't remember a time on Steem where the majority were held waiting for a month before uncontactable/silent consensus witnesses were finally ousted.