I don’t know about tipping point for us, but possibly for Illinois.
Go back to 2010. Iowa was beating Wisconsin, Wisconsin has the ball in their territory on 4th and 4 to go, they go for a fake punt, gain a bunch of yards, score a TD on the drive, and win the game. Everyone points to that game, and that particular fake punt as the tipping point in the Iowa Wisconsin rivalry. They‘ve effectively dominated us since that play. And a big reason for that was their coach for the first part of that stretch..
Now Illinois comes in having been so far in Iowa’s rear view mirror for so long that they are an afterthought. But look who their coach is now and how he’s gotten them playing so far this year. This could be a program changing opportunity for them that springboards to success for the future. With the unrest in Wisconsin and Nebraska, Purdue and NW doing the same stuff they always do, plus Iowa seemingly playing like it is the 1970s or earlier, only Minny and Illinois seem to be on the ascension in the West currently, and Minny may still be smoke and mirrors.