Also one-wings are notoriously hard to fly and B-52's are actively supporting the pilot (via computers) to even make it operational for a human, if I don't misremember. So maybe that failed?
Having passive assistance that couldn't fail would actually be a great thing an bring one-wing designs into the commercial aviation.
Edit: I was mistakenly speaking about a (rather) modern bomber B2. Mistook it for the B-52, which isn't a one-wing and built not long after the second world war.