In Dune we never learned what exactly went down in the butlerian jihad. Perhaps it was worse than idiocracy and the galaxy became monumentally stupid for an eon or two, rather than a bloodthirsty Terminator scenario.
Ah, I’m a purist and didn’t like the extended volumes by his son. Obviously I didn’t read it but the plot summary sounds painfully pedestrian. Was it good and I’m just being a snob?