Of course, the 'presumption' of increased complexity or the 'subjective perception' of a drop in performance might be the cause. But we are missing the real point here: the 'false plateau.' Regardless of user perception, is it possible that a 'false plateau' exists that keeps us away from a major leap in performance? The risk is that the simple 'perception of having taken the wrong path' by researchers or companies would lead them to ignore the possibility of such a 'false plateau'...