All the unmanned piloting reminds me of the old statement, given an infinite amount of time, a typewriter, and plenty of paper a monkey will eventually compose the entire works of Shakespeare. In some lesser amount of time, in theory, an algorithm will be developed to reliably negotiate ground congestion at some of the busiest airports.

In 1969, the first lunar landing would have been a fatal disaster if former test pilot Neil Armstrong had not taken the controls away from the computer to fly over a rock field and land safely with only one and a half seconds of fuel left.