Given the Max is so close to older 737s, I see no reason why Boeing and the FAA couldn't come to a similar arrangement, were pilots can be cross-trained with a

Given the Max is so close to older 737s, I see no reason why Boeing and the FAA couldn't come to a similar arrangement, were pilots can be cross-trained with a 1 week course and maintain simultaneous type ratings on both the Max and Older 737s. Greed and hubris, would be my best guess.