Earlier quoted context omitted.
Amen. I wonder what "underestimating" something like AGI actually means though...
Assuming it's aligned and we're still around… AGI? Lots of people are still talking like it will be an assistant, perhaps using the "centaur" metaphor, and refusing to believe that it could[0] result in everyone's mental capacities having all the economic relevance of equine muscle power. ASI? We don't know how far above us IQ can go, but it seems reasonable to guess that the smallest possible margin above us is such…
"You mustn't be afraid to dream a little bigger" with regards to the hierarchy of intelligence - the "at worst" is much further away than human-to-lawn. Look at the intellectual power of angels in Catholic theology and consider an intelligence that can reason from universals to all particular instances as its default mode of operation. Then consider that each angelic being is distinct from each other one by nature (since they are immaterial). Which means that there is a species-level difference between each of them and the lowest one is already far above us. Then consider that there are (at least) billions of them, each one order of magnitude more intelligent than the one below it. Then consider the kind of intellect that can create those kinds of intellects.
Fortunately, you can't give what you don't have, so we're quite safe from the basilisk. But the wild imaginings of John C. Wright's Count to the Eschaton Sequence are probably not far off for "hey how weird could it get?"