I think there are a number of factors that would prevent a massive defection of fans in any of these sports. 1) Sports takes up a greater chunk of the national consciousness now than it did 25 years ago. People identify with the teams more and they've become more of our self-image. I know that ESPN has trademarked the term "SportsNation" but there's a lot of truth to it. 2) As mentioned above, nearly all the games are televised now, plus the existence of the internet makes it easy to be a fan. 3) Success breeds success. The Badgers have been able to funnel the rewards of their winning seasons into new facilities that will help attract the best athletes. Kohl Center, Camp Randall renovation, and now there's a new hockey practice facility in the works. I hear that the football training spaces are pretty outdated compared to the rest of the Big Ten, so I'd imagine that's next on Barry Alvarez's wishlist. With the Packers, not only does the team have great management in place (Murphy and Thompson) but the NFL's league roster structure and salary cap makes it easy to go "worst to first" and that makes it easy to avoid the type of 15-year droughts like Green Bay experienced in the late '70s and '80s. There's much more risk of the Brewers falling into a funk, but Attanasio has exhibited steady leadership and found ways to make Miller Park appealing to casual fans and make it a family fun destination. Tailgating helps here too.