Not quite. The -47 was replaced by the -58. It, in turn was replaced by the F-111.
IMO the plane was more of an experiment in what they could build than a viable weapons platform
Without the underbelly pod it was a beautiful plane. It was used to set a few records, winning the Bendix trophy. Kind of validates my opinion.
And to go from the -58 to the -52 to deliver nukes,citing the Russian missles makes no sense to me.
ICBMs could do the job better. Just lile sattellites rendered the SR-71 obsolete.