R. David Steele wrote:

I am not a fan of idea of taking an airliner design and making it
a cargo plane.

For the vast majority of the air freight business, airliner designs work
very well indeed. Very few users need the short-field or oversized cargo
capacity of a BC-17X. A 747-400 Freighter carries more cargo, cheaper, than
a military-derived cargo plane; Boeing only offers the BC-17X for a very
specific (small) niche market.

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