Comment by AnimalMuppet

Yes, they did, or at least some of them did. The claim was that AI would become smarter than us, and therefore be able to improve itself into an even smarter AI, and that the improvement would happen at computer rather than human speeds.

That is, shall we say, not yet proven. But it's not yet disproven exactly, either, because the AIs we have are definitely not yet smart enough to meet the starting threshold. (Can you imagine trying to let an LLM implement an LLM, on its own? Would you get something smarter? No, it would definitely be dumber.)

Now the question is, has AI (such as we have it so far) given any hint that it will be able to exceed that threshold? It appears to me that the answer so far is no.

But even if the answer is yes, and even if we eventually exceed that threshold, the exponential claim is still unsupported by any evidence. It could be just making logarithmic improvements at machine speed, which is going to be considerably less dramatic.