> I might also add that the very concept of superintelligence is pure speculation - basic AGI at least can be grounded in replication of human brains
I'd tend to think the reverse: the idea that we can recreate general intelligence requires some degree of speculation, but once we have general intelligence running on a computer, it takes a fairly contrived set of conditions for it to not scale up exponentially.
This is speculation. We don't even know what general intelligence on a computer will look like, therefore we don't know what constraints there will be, therefore it is speculative to say there won't be constraints on exponential scaling.
I'd tend to think the reverse: the idea that we can recreate general intelligence requires some degree of speculation, but once we have general intelligence running on a computer, it takes a fairly contrived set of conditions for it to not scale up exponentially.