This thread should be renamed Boeing-R-Us.
Airliners are very thirsty at 300ft. What is not understood about endurance ?
Turboprop noise under the sea. Is that a Disney song ?
The Bloomberg article talks about relying on computer software instead of a MAD boom, and, flying at high level more can be seen. Perhaps in that case drones are the way forward?
Nothing has been decided yet. Notwithstanding the Boeing wannabee salesmen on this thread.