APFDS, during the severe windshear envisaged in this post, your FBW ground speed mini is not sufficient for "so that the pilot can fly the aircraft normally" Perhaps you and others who refer to Reference Ground Speed were thinking of more managable shears. A common downburst from a decaying CB could result in windshear in the region of 80 knots plus. So if your IAS drops 80K on late final in the landing configuration, and at the same time your sink rate increases from 600fpm to 3000+fpm, TOGA & alpha floor are insufficient for survival.