They're going to try again, HD. In the next few years a new tool is going to be developed where final approach spacing is worked out and applied with reference to time and groundspeed, rather than distance and airspeed. Needless to say, many of us are not enthusiastic. To achieve the required spacing at touchdown against a strong headwind which decreases in windspeed as you get lower, planes will be flying one and a half miles apart at ten miles!
