At risk of the usual cadre of crackpot loons answering
10/80% flaps out or 4/75% flaps up targets in the event of Airspeed Unreliable?
Boeing are peddling this as a go-to solution to Airspeed Unreliable, it looks reasonable in a takeoff scenario at moderate weights however highly dubious in high altitude scenario with ice related Airspeed issues etc
what do you think?