Well the military is already done with the f-22 and f-35 they have tried to bled boeing dry to get a cheaper solution and they didnt.
The 737 is the so called cash cow of boeing but is it really ? All parts are outsourced now anyway only boeing puts it together.
So drop the whole 737 and focus on a clean sheet design someone else can keep making 737.
The battery issue on the 787 was stupid but they use the same batteries in tesla's and laptops and know they know to shut down charging when a cell is overheating