I am thinking 370 was an experiment, a dry run to see just what procedures they would encounter, how the plane would operate, etc.
It still puts everyone on alert (look at these FR threads). Not a good plan at all. Moslems aren’t that stupid. And it’s not their “shock” MO, either. How long do we wait for this plane to actually attack something?
I think maybe it attacked a mountain. Just like that Japan 747 in the ‘80s. People lost consciousness for a short time and totally screwed up how the plane flew.