This objection further assumes that the end-point after consuming all low-hanging fruit is a pre-singularity level AI. If a self-improving AI runs into algorith

This objection further assumes that the end-point after consuming all low-hanging fruit is a pre-singularity level AI. If a self-improving AI runs into algorithmic limits only after figuring out how to turn the solar system into computronium, that's still worth calling a "singularity".