Yes, I hear you, I just haven't ever heard of a B744 multiple engine failure since the species came out of the shop in 1988. But I've heard of a B744 flying 10 hours on 3 motors from LAX to MAN...! So, my point is that I don't worry in advance, that I don't clutter my mind with improbabilities. I'm adequately familiar with the Tien Shan mountain range as I have traversed it beaucoup times in daylight hours and know where it's 24,000' peak is. And if ever I'm down on 2 engines, I will dabble with 2-eng driftdown profiles.