Rising longevity is one reason why companies are anxious to wriggle out from under the promises they once made (though they also keep a weathereye on the risks posed by volatile interest and inflation rates).
They cannot perform the kinds of maneuvers typical of manned tactical aircraft, and their flight routes are usually planned carefully with an eye to local weather conditions.
Its barometric altimeter tracks changes in pressure to pinpoint users' altitude, and they even can use it to plot barometric pressure over time, which can help keep an eye on changing weather conditions.