We'll be experiencing extreme social disruption well before we have to worry about the cost-efficiency of strong AI. We don't even need full "AGI" to experience socially momentous change. We might even be on the verge of self driving cars spreading to more cities.

We don't need very powerful AI to do very powerful things.

It's not just a energy cost issue with AGI though. With autonomous vehicles we might not have the technology, but we can build a good mental model of what the thing can look like and how various pieces can function long before we get there. We have different classifications of incremental steps to get there as well. e.g. level 1, 2 and so on where we can make incremental progress.

With AGI, as far as I know, no one has a good conceptual model of what a functional AGI even looks like. LLM is all the rage now, but we don't even know if it's a stepping stone to get to AGI.

> experiencing extreme social disruption

I think this just displays an exceptionally low estimation of human beings. People tend to resist extremities. Violently.

> experience socially momentous change

The technology is owned and costs money to use. It has extremely limited availability to most of the world. It will be as "socially momentous" as every other first world exclusive invention has been over the past several decades. 3D movies were, for a time, "socially momentous."

> on the verge of self driving cars spreading to more cities.

Lidar can't read street lights and vision systems have all sorts of problems. You might be able to code an agent that can drive a car but you've got some other problems that stand in the way of this. AGI is like 1/8th the battle. I referenced just the brain above. Your eyes and ears are actually insanely powerful instruments in their own right. "Real world agency" is more complicated than people like to admit.

> We don't need very powerful AI to do very powerful things.

You've lost sight of the forest for the trees.