baader-meinhoff has been a neologism for a long time now, enough so that it isn't really a neoligism anymore, and we just collectively moved onto accepting it as the name of this phenomenon.

there's a lot of these sorts of in-sphere jargon; you'll start picking them up if you peruse the more esoteric threads on tech news blog aggregator sites like this.

like, if one of the original repliers in a thread is "why is this on HN", there's an increased chance imho that you'll run into this sort of techno-cultural salon effect.