> Why do we believe that LLMs are going to stop there?

Why do you believe they wont? I think it's reasonable to assume that we will hit a ceiling that current models will not be able to break.

> We have robots walking just fine now, by the way.

Walking and reasoning are unrelated abilities.

Walking was given as an example of "hard to program a robot to do it" by GP. Well, now we have robots that can walk.

What evidence is there that LLMs have hit a ceiling at being able to do things like talk to users or stakeholders to elicit requirements? Using LLMs to help with design and architecture decisions is already a pretty common example that people give.