[Serpiko]

The use of canard (foreplane) in combination with tailplane on the aircraft of the second video is an extremely agile combination. Experiments in the 1960s by USA manufacturers lead to the conclusion that such combination of both foreplanes and tailplanes is not needed for combat, adds to the vulnerability of the fighter, and increases drag over using only foreplanes or only tailplanes.

Well, maybe the "supermaneuverability" given by extra canards and thrust vectoring is useless in combat, but I guess that the near-stall controllability it brings is a valuable perk in carrier operations, when you have to land a 20-25 tons bird on a deck!