(1) Yes.
(2) Are you saying that you think we're at the limits of computing in general, or that specific technology?
We know, for example, that a human brain level intelligence is possible to run on a human brain. We are nowhere near that. And actually that's not even a physical limit necessarily.
But that is...not a low hanging fruit.
> We are nowhere near that.
Nowhere?
Leaving aside the discussion on LLMs intelligence vs human intelligence, on a purely energy consumption level we are definitely and without any possible questioning nowhere near that indeed.