I suppose if we wanted to dig for what is realistic about it we could pretend the it so the turbos in the cars cool down before they stop. I had to do this in my old Talon TSI (eclipse GSX) for at least one minute before turning it off. Was good for the bearings or something. I've seen some cars that have a after market ignitions that does it after a few minutes. Though, only some cars have turbos in LFS......
Not serious...btw