Jōhatsu (…) refers to the people in Japan who purposely vanish from their established lives without a trace. (…)

seems to me he’s trying to be more general than the Search example and considering that another complex project may actually have those problematic cases

i mean, he doesn’t even dismiss the patterns with code duplication, just lists it as a drawback, which agrees with his conclusion that there’s no one-size-fits-all solution