Apocalyptic rumor had it that it ended up behind schedule due to project managers changing and one decided he wanted the seating arrangement to be side by side like in the A-6 Intruder which meant the fuselage needed to be reworked.
Next project manager tried to change it back.
Bam, canceled.
weird apocalyptic rumor has it when i tried to modify my a-10 intruder to the backside instead of full frontal joystick control it was bam cancelled
Sounds likely.