I would like to post more thoughts but that would go against the board guidelines..
They found the one that went down off of Brazil a year later.
The plane continued meandering about on autopilot and then crashed into the ocean.
The second most likely is suicide, which is not unprecedented. In fact, it's rather common.
Thus... It might not be found tomorrow, or next week, or a year from now... but it'll be found eventually.
At least, the black boxes will.