Originally Posted by
Less Hair
I seem to remember Boeing discussed a similar optional system some years ago. The core concept was some new autopilot function that would do very steep climbs right after takeoff, still safe and within the envelope, but with not much margin left. It flew right at the steepest angle, steeper than human pilots would typically do it, therefore improving climb, time to altitude and fuel burn. Not sure what happened to it.
Imagine being an unsuspecting passenger during that maneuver. 😉