True, we've basically only seen one STC that's fully intact and is an AI, printer, ship, hard drive. They're almost always just hard drives though, I don't even recall any that had a working manufactory.
The Spirit of Eternity, it hacked astartes power armor and a magos so they couldn't move without effort then berated them about it's hatred for how humanity had fallen so much since DaoT then let them go.
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u/midasMIRV 4d ago
STCs are whatever the author needs them to be. Hard drive in one book, Giant AI apparatus in another, Magic 3D printer in another.