May have missed it in all these recent posts, but no-one has mentioned the Daallo Airlines event in Mogadishu back on 2 February this year, where a hole was punched out of the fuselage, supposedly by a laptop device. They got the timing and the placement of the laptop and the airline wrong, (last minute swapout of aircraft, see link) but it must have been a learning experience for whoever built it.
https://www.rt.com/news/331800-somal...omber-turkish/
Since at present almost any theory is valid, just throwing this into the pot to bear in mind.