[TaylorAlexander]

> with careful planning between the two of them they could do the necessary preventative maintenance on each other so that they didn't break down at the same time, or could go rescue the other if it broke down unexpectedly in the field, how long would it take them to build the infrastructure necessary to produce new parts to replenish their stockpile and generate new robots so that they could experience exponential growth?

There is a lot happening here. Really big jumps. Sure, humanoid robots with lots of spare parts could repair each other. You could also just imagine a robot that never broke down for this thought experiment. Still, going from nothing to "can build more complex humanoid robots", even with very persistent workers who never get tired, is an extreme endeavor.

I suppose some day the equipment to build a humanoid could be cheap and accessible to home fabricators. But that equipment still will not just be "a humanoid", it will be specialized machinery. You could certainly have humanoids operate that machine, but I still see this scenario as "imagine you have two humanoids. now imagine you have two humanoids and a humanoid manufacturing machine. they could make infinite humanoids". There is no getting around the fact that a machine that makes humanoids will be a separate machine.

Will it be interesting when that happens? Yes, absolutely.