Who killed,
You wouldn't have triple 7s rolling off the Boeing line if Scarebus hadn't hoisted the big twin idea upon the world 30 odd years ago, not that they have necessarily done the best job of it. To the endless Boeing drivel of "it's so good we're never going to change it" we'd still be flying good for their day but ancient planes like the 707, 727 and 737-200..... As it is now it's just cr*phole backwater African airlines and Air NZ finally phasing out the latter