> I think now, after another documented murder-suicide, there's also been a change in regulations requiring at least 2 people to be in the cockpit at all times.

This would help prevent a nefarious pilot from taking the plane down.

Arguably, many of the things suggested might potentially have prevented Zaharie from carrying out his plan, assuming the scenario described in the article is true, depending on his motives: if the plane could have been intercepted in mid-flight, if he would have been found out almost instantly, his family wouldn't have been able to collect life insurance; if his motive had been less financial for his family and more about the intellectual challenge of getting away with the perfect crime, this too would have made his task more difficult.

But that aside, when we say "prevent the next MH370", it's ambiguous: we could interpret that as "prevent a pilot from deliberately crashing their plane and killing everyone on board", or we could interpret it as "prevent a plane from vanishing", which has been devastating to families in its own unique and horrible way. In other words: locating the wreckage faster - or at all! - has value too, and shouldn't be dismissed.

Actually two things were proposed, real-time flight tracking and real-time virtual blackbox, the former was accepted but the latter was not.

If real-time flight tracking data is frequently and continuously monitored 24/7 like in NoC, it probably can prevent the disaster like MH370 from happening again.

The latter real-time virtual blackbox proposal if accepted can be even more pro-active in preventing future incidents, and it can be easily integrated and embedded with the real-time location tracking albeit with extra cost to the airline operators.

Apparently the latter proposal according to ICAO was rejected due to the complaints from the pilot's union that cited privacy concerns. It seems that pilot's privacy is of higher pririty than the passengers' safety. You can have all your privacy in your house but when you are piloting aeroplane with many people life is your responsibility, pilot's privacy probably the least of your concern.