I know that Horner and Toto is solid at where they are and won't change, but if it is possible then Ferrari, or even Aston Martin that he left, or any other team that takes him could really have a huge chance. This dude is the epitome of a great driver who understands the car, like Lewis for example is a great racer, but he is great racer behind the wheel, but when he is out, he is just a fashion icon or whatever, whereas Vettel understands the car itself just like an engineer as well and that could really turn a team into a marvellous future if he can be hired.
It's def a possibilty... Vettel becoming a team principal I mean. But def not a team principal for Ferrari. Vettel lost his hair in that team as obv there was a lot of team politics at play. He even said that he wanted to as Schumacher for advice on the finer side of team politics. But it wasn't possible because of Schumacher's skiing accident.
Back in the day in Red Bull, Vettel would be beside Horner when he got a DNF and just be looking at the monitors or in the garage he'd be talking to Newey to understand more about the car. And it was said that he worked very closely with his engineers in the garage, working all night until the wee hours in the morning. So yeah...
He'll prolly be groomed to be Red Bull's team principal to replace Horner.