Originally Posted by
oldoberon
when put that way it is so logical, i do hope certifying bodies used same logic. long time since I did a long flight over water, and always preferred 4 to 2, having read your post that preference will remain in place.
Unfortunately, if all four have the same software version then all four could in theory crash and such faults do happen even on fully tested systems. Such as the
F-22 Squadron Shot Down by the International Date Line 