If and when we reach the point where 95% of the blocks published in the last 1000 have the new block version number
That is, if someone with commit access doesn't change the requirement to, say, 60%. Because good reasons and won't you think of the children.
if that would be his intention why do you think
he made the 80% proposal in the first place?
he could just have committed it and send out a warning message to all "urgent; please update"