"[...] In a macroscopic axis, the A350 XWB considers the actively deformation of the surfaces to provide the best aerodynamic performance and control of load for each flight conditions; takeoff, climb, cruise, approach, landing, maneuver, turbulence-encounters, etc. This is what birds, fish and marine mammals perform beautifully, called "morphing". The idea is to move from a 'rigid' world to flexibility and adaptation technologies."
The design evolution process never ends. There are some robust associations between features that guide the designs which live longer.
In other words, the best design today will eventually be replaced by tomorrow's best of "de jour".