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I imagine you've probably made slow progress gettintg to the button you need to get out and press, so Turbo is probably cool enough. But as far a turbo cooling goes, whether it is coolant or oil cooled if it is hot, ie just had a real hard run and stopped, the engine does need to idle for a few minutes to cool the unit down and allow the turbine bearing to stay lubricated while turbine slows down.
A lot of new vehicles may well have shutdown protocols, but that does not necesarilly mean it is appropriate for all vehicles.
Is it really 1 minute to get out and press a button and get in and drive on?
My vote is less than 1 minute leave it running.
1-3m, whatever you think is appropriate.
More than 3min, shut it down.
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