DBWI: XF-108 Cancelled

What in your opinion would have happened if the XF-108 had been cancelled. We know how the F-108 and B-70 played a crucial role in the Third World War, destroying the USSR. The F-108 destroyed almost every Soviet bomber entering American airspace in 1962.
 
I would argue that the F-108 was bigger than it needed to be, went faster than it needed to go, and flew higher than it needed to. The F-106 was cheaper and was a very capable interceptor as well. In addition, the massive network of Nike sites would have shredded any planes that leaked through. So, the defense of CONUS would not be diminished by the loss of the F-108. And had it been canceled it would have lived on in the F-14 and the A5 Vigilante.
 
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