I like the way you think but while the A300 might not have all the bells and whistles it is the undefeated jumpseat Champion of the fleet. The last one was delivered in 2007 so the planes aren’t that old compared to the MD’s. There’s currently no announced plan for replacing them.

The 757’s on the other hand are high time former passenger planes that have lots of hours on them. It’s possible those are replaced before the Airbus, but no one really knows. FedEx could decide to follow UPS and do the A300 cockpit upgrade and keep those around for another 15 years, when the youngest would be 29 years old, however an aerodynamic and engineering design that’s about 67 years old.

The only thing I know is that FedEx is slow to make fleet changes, but it wouldn’t surprise me to see a new type announced soon, because I don’t think any of our aircraft orders meet the new emissions requirements that go into effect in 2028.