I still think that one of the pilots did it!
As the search for Malaysian Airlines Flight MH370 drags on, I am more convinced than ever, that either the pilot or co-pilot deliberately flew the plane to oblivion. I don't buy the "heroic" pilot narrative where the pilot turned the plane around and then they all died inside with the plane carrying on with autopilot.
If the plane were in trouble, they would not have turned at GPS way points. And now, with new evidence that the plane flew faster than predicted for hours, that means that they had to fly max to avoid passenger suspicion.
Will MH370 be found? Probably. It may take a while. Perhaps it may take a long while. However when all is said and done, the only logical explanation is that one of the pilots illogically scuttled the plane with all lives.