For as miserable as he looked in Jacksonville, he still lacks self awareness and is crazy competitive. I can't imagine that Jacksonville is the exit he wants for himself from the profession. He's unretired three times now. Maybe you are right and he's finally done, but with his personality I have a hard time thinking he's not going to want to get back into it. Not to mention I don't think things are as rosy at home as his wife and kids are projecting on social media. He may want to be back in it and not at home, and they may not want him home either.
However woke people think society is, we have pretty short memories and attention spans. The coaching carousel starts spinning earlier now than ever. Sark hits too many potholes come fall in Austin, I have a hard time believing they don't reach out and see if he's interested. That program is desperate to win and they're headed to the SEC in short order. The portal and NIL give players more leverage. Meyer will know this, whoever hires him will know it and so will the players.
As an alum of Cincinnati, you can't tell me there would not be mutual interest should Luke Fickell eventually leave there. They're going to be a Power Five program soon. If Ohio State did show him the door, what an opportunity for this spiteful shit of a human to go recruit for Cincinnati against Ohio State.