gzt: Best conclusion from the evidence is a crazy pilot planning hard to create a mystery and unexplained death. Yet to know if insurance might be a partial motive in that thinking.
But really there is much not known. Erebus for instance showed that a lot can come out afterwards and there can be many motives for governments and corporations misleading the public.
Next stage is crash investigation and black box recovery which looks to be a drawn out process if ever at all.
You would really hope that pilot suicide wasn't what happened, because it has ramifications for anyone flying, as to whether you can trust your pilot, and whether there shouldn't be some form of override on the ground. A lot of people and companies have a vested interest in this case, so it really needs to be answered. Any major disaster like this really needs to be solved, and the fact that it crashed where it did makes it probably one of the most difficult places in the world to find it. Whether that was planned or not is the question, and I guess the flight investigators can check this by the timing of when the flight plan got changed. But there seem to be conflicting stories about this. The quote I heard, was that it is not just finding a needle in a haystack, it is having to find the haystack to begin with. Or it is like finding an object the size of a stapler in an aerial photo, if the search area was the size of NZ.