> we're going to be able to create systems that are far more complicated than anything we could make before

I find that unlikely. You can't outsource your understanding of a system to a machine that fundamentally does not understand.

Complexity is built on top of layers of abstraction, and AI is not an abstraction.

Moreover, I don't see obvious areas where more complexity would drastically improve our software. We're drowning in unnecessary complexity right now. FAANG has had (effectively) unlimited manpower for decades, and what have they done with it? Mostly enshittified once-decent software.