The thought that anything could improve without bounds would be absurd. We are living in the physical world after all. The (open, interesting) question is how close we are to the limit.

Types of technology - of which we can include intelligence - move along S curves, but it's more absurd to think that humans are near the top of that curve rather than right at the bottom.

There might be a thing beyond intelligence that we can't even conceive of.

It’s safe to assume that after less than a decade of LLM development, we’re nowhere close to the limit yet. In fact, progress still seems to be accelerating at the moment.