Agreed. I think people are extrapolating with a linearity bias. I find it far more plausible that the rate of improvement is not constant, but instead a function of the remaining gap between humans and AI, which means that diminishing returns are right around the corner.

There's still much to be done re: reorganizing how we behave such that we can reap the benefits of such a competent helper, but I don't think we'll be handing the reigns over any time soon.