Not extreme? Have you seen his interviews? I guess his wording and delivery are not extreme, but if you really listen to what he's saying, it's kinda nuts.
I understand what GP is saying in the sense that, yes, on an objective scale, what Sam is saying is absolutely and completely nuts... but on a relative scale he's just hyping his startup. Relative to the scale he's at, it’s no worse than the average support tool startup founder claiming they will defeat Salesforce, for example.
That Dyson sphere interview should've been a wake up call for the OpenAI faithful.