@fishidwardrobe @cstross @graydon We are hitting lots of limits - on silicon sizes, on power, on validation (hardware and software), on correctness, on data sets and many more.
A human brain weighs about 1.5Kg, outperforms an LLM and doesn't require a large power plant so there are clearly better ways of doing some kinds of computation (although humans of course suck at many kinds of computation too so it's an iffy generalisation).