As an aside, I wondered how a modern airline pilot travelling as a passenger would fair in the "both actual pilots become incapacitated" scenario.
I have always assumed that in the past a Stratocruiser pilot could have safely landed a DC-7 or L1049. And vice versa.
Perhaps DC-8s, B707s and Comets too.
But does my assumption work for B747, B777, A330 etc?