The thing is, the example of the "march of nines" is self-driving cars. These deal with roads and roads are interface between the chaos of the overall world and a system that has quite well-defined rules.

I can imagine other task on a human/rules-based "frontier" would have a similar quality. But I think there are others that are going to be inaccessible entirely "until AGI" (or something). Humanoid robots moving freely in human society would an example I think.