Just a hunch but everyone loves their 757/767. My hunch is these senior ATL 767 guys go to the ER. ER guys would then get displaced and most likely to airplanes they can hold. And knowing that these pilots will bid back to the 757/767 ASAP, then they know they'll have to pay for two training cycles per MD'd ER pilot. That cost cash, which is just money. So what's the ROI on MDing an ER pilot to the 73 vs keeping them on the ER?

Ah the price you pay for me making every base ER qualified!
Lax no international flights, SLC one international flight(CDG),Msp One(Ams)
Should have kept them domestic as well as ATL. Then they could have made Jfk,Dtw,Atl and Sea purely international on the 7ER