This is the same issue we saw with the F111. McNamara insisted that one plane could do it all. It was a dog, and only found use as an electronic warfare platform.
President Reagan used the General Dynamics F-111 “Aardvark” quite extensively during the 80’s as a medium-range interdictor and tactical strike aircraft that also filled the roles of strategic bomber, reconnaissance.
The Navy version (F-111B) was a dog. It weighed more than the A3D “Whale” did and didn’t live up to expectations (mostly due to the Navy changing the requirements).
The Air force version on the other hand, was very successful and served for 31 years.