The 767 is the only medium widebody available that “works” for express integrators.

Anything larger creates issues with existing parking….not insurmountable, but an issue nonetheless.

FDX is seemingly all in on the 777, UPS on the 747 for large freighters. The A350-900 is pretty close to a 772 in terms of cabin volume, and the speculated freighter is speculated to be a -950 to likely squeeze an extra row of ULDs in. How it would compare relative to Bigfoot, nobody knows.

The A333P2F is the closest thing available in containerized cube to a MD11 short of a 777F, but still has wingspan issues compared to a MD - albeit less than a 777F or 744.

A 767-400 based freighter would fit the bill as a MD replacement but is currently unannounced vaporware; a 777 conversion for ample passenger -200 feedstock would likely change the game but it seems right now the -300 Big Twin the only thing in the offing.

All widebodies pay the same, right? [emoji6]