Based on the White House satellite data contribution to the discussion on the possible fate of the aircraft, perhaps deleted posts ( including my own) proposing a due west course ( ?intentionally) outside of radar coverage with a final demise in the mid or west Indian ocean ( to fuel range) might be reinstated as reasoned contributions to the discussion!.
If this search was easy to solve with conventional thinking given the existing deployed assists, it would have been.
The thesis is an intentional act by a well informed person/persons in sole control of the flight deck. The Egypt air accident of the US east coast would be a similar category event.