That is clever. I wonder who had the idea?
Someone on his staff, no doubt. Because unlike 45, he has a reasonably competent staff, most of whom he has managed to keep for the duration of his administration.
Perhaps the biggest argument for Biden over Trump would be to just compare average tenures of cabinet members during the respective administrations. Perhaps a weighted average, with positions like State, Attorney General holding more value. Buttiegieg has done a better job at Transportation than Elaine Chou (correct by construction because she didn't do anything) but even a bike geek like myself knows Transportation isn't as critical as State.