Not sure what role this serves for the USAF. It's a transport. Wider loads? Stealth?
The US has had total air superiority in every conflict since the Korean War. That's over. The Ukraine war makes it clear. Against a competent opponent, most of what flies will die. There are just too many man-portable and truck-mounted systems that can take down aircraft. Zipping over hostile territory in helicopters is pretty much out. Flying big, fat transports over contested territory is out. Anything that flies over hostile terrain had better be able to hide, evade, counter, and fight back.