I think one thing that's been proven is money is not an issue for these schools. If they hired a 64-year old coach and he made the playoffs the next 6 years and won a national title before retiring, they'd all consider that a huge win.
Except nobody is going to be capable of doing that, save for maybe Ohio State and/or UGA, and they both already have NC winning coaches (one who is about to get another one). Everyone else is a big fish in a big pond (SEC teams with mid-level / unproven coaches), a small fish in a small pond (ACC/B1G), or a mid-sized fish in a pond with a great white shark in it (every B1G team besides Ohio State).
Indiana didn't immediately extend him for more money if he wasn't going to be a strong target for these jobs.
Indiana literally doubled his salary halfway through his very first season, before they even made the CFP. Then they gave him a huge raise on that amount this year, to make him the 3rd highest paid coach in all of college football (behind only Kirby and Day).
I’m going to repeat that in different terms.
Indiana made a 64 year old guy with one career Top 25 win, no career playoff wins, and no Top 8 finishes the 3rd highest paid coach in all of college football, ahead of a guy with multiple titles (Dabo). Ahead of Sarkisian, Elko, DeBoer, Freeman, Dillingham, Lanning, and many others. Every single one of those guys has done at least as much as Cignetti, and all except for maybe Elko have actually done more. And every single one of those guys is under 50 years old, and somehow still have a longer track record than Cignetti.
The bottom line is that Cignetti seems to be a great coach, but IU is still overpaying him by an absolute shít ton. Both of those things can be true. And I don’t think anyone would be surprised at all if he starts fading in 2-3 years, as it will likely not be sustainable for them to pay both him and the players what is required to keep the current level of success rolling.