There is one other significant fact not mentioned. Turbulent drag,
basically a fluid flow is highly unstable. There is the classical
statement of the butterfly in Japan causing a hurricane in the Gulf.

This represents the control of chaos. Stalling represents the complete
breakdown of laminar flow. So it will not only improve stall
performance, it will (potentially) reduce fuel consumption. Turbulent
drag is caused by vorices in an unstable fluid flow. Fewer vortices =
more kilometers, fewer liters.