My money is on ultimate cost cutting. Neutral drain allows for more economically designed clutches and drive trains.
FWIW in the early 2000s a Maytag home center service tech told me that Whirlpool went to neutral draining because the clutches were wearing out to fast.
FWIW in the early 2000s a Maytag home center service tech told me that Whirlpool went to neutral draining because the clutches were wearing out to fast.