but it wasn't the wins over Iowa State that swung Iowans toward being Iowa fans. It was a part, but not the sole factor. Multiple wins over Michigan and OSU that decade, going to a Rose Bowl, winning two Big 10 titles endeared Iowans to Fry and Iowa more than just beating Iowa State. And note that Iowa won a conference title and went to a Rose Bowl in 1981, a year in which Iowa State beat Iowa. My point is that Iowa endeared itself to fans around the state by success other than by beating bad ISU teams during that time period.
It also coincided with a time where more games were put on television. Numerous people who had never been to a game in Kinnick (nor to one since) saw some Iowa games on TV, and saw Iowa play in and win (as well as lose) some very big games during that decade (81 and 85 Rose Bowls, the Peach Bowl against Tennessee with Willie Gault and Reggie White, Freedom Bowl, Holiday Bowls, the 85 game against Michigan, No. 1 vs No. 2.) It wasn't until 83 that Iowa started the 15-year run, and while that helped certainly make Iowa the "favorite" of the state, whatever that means, it wasn't the only factor.
ISU's descent into the abyss starting in 1983 meant that the Cyclones were not part of the explosion in college FB with games being televised, highlights on cable networks, going to the ever-increasing slate of bowl games, etc. The same thing has essentially happened to the Iowa basketball program over the last decade+. Iowa has basically lost an entire generation of basketball fans who have ZERO memories of Iowa being relevant in basketball. If you are under age 25, Iowa hasn't been going to Sweet 16's or even an afterthought on a national scale in the time period that you can remember.