Hi Organfreak
At some point, system utilization must merge, or we end up with something, you know, Rutanesque.
Some would have said (and still say) "Thank GOD for two TRENT700s. (BEA038)." Where the neck narrows, there is the executioner's blade.
RR NDB. (re Kelly Johnson). Where are these giants today? Gone. What we have left are committees, ffs. risk/benefit. Over-reliance on the ability to disappear and blame others. COMMAND? gone.
Captain Hank, on his Stratocruiser, "This is not a god damn Democracy!"