I know lol
But when the turbo is sat there turned off like Ricky has said its going to burn the oil! So when restating the car the next morning the burnt oil is going to get spun around that shaft/bearing so still going to course damage over time!
I do however get what you are saying about the run down time if you are driveing home after racing someone and you dont come on boost all the way home and just took it steady then i cant realy see that been a problem as the oil has had time to cool down to a leave thats not going to course problems