I recently watched a summary of what is publicly known about MH370 on Mentour Pilot, a compilation of radio pings from several different systems, engine health reports, passenger internet, etc. The accumulated evidence was that the cabin was depressurized at some point soon after it deviated from its usual path. Passengers would have been unconscious. Transponder turned off etc., and its path avoided air traffic control, threading the boundaries between countries. Not a theory but a fact, someone deliberately flew that plane off into the Indian Ocean…