I think they will find it fairly soon. In due time all will be known, flight recorders paramount.

It seems it flew on for a ways after comms ended. The auto-pilot would allow that, once programmed or pointed in the right direction. With the transponder off, it was most likely 'turned off'. If so, whoever was in the cockpit knew about flying planes. That may include an intruder or one/both of the assigned pilots.

I think they did get away from last contact, or they would of found debris. I hope the U.S. Navy can uncover some 'pings' in the ocean somewhere. I'm still about open to all possibilities.