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like if anyone had halfway-plausible "grey goo" nanotech that could do anything that looked like computation, that might be worrying. a locally viable self-reproducing platform that can make another one of itself from a pile of dirt, even if it's like, special dirt, that might scare me a little bit. but an overlord hive-mind that requires an uninterrupted global high-purity helium supply chain just to make ONE more of itself is supposed to be a threat?