SWA has optimized their operations to the point where there is little margin for error. They have the quickest turnaround times. They land at the highest speeds

SWA has optimized their operations to the point where there is little margin for error. They have the quickest turnaround times. They land at the highest speeds their planes are designed for. They taxi at or maybe above the maximum allowed speeds once on the ground. This all works great most of the time but when it does fail, it tends to do so spectacularly since there is no slack in the system.