To be generous and steelman the author, perhaps what they're saying is that at each layer of abstraction, there may be some new low-hanging fruit. Whether this

To be generous and steelman the author, perhaps what they're saying is that at each layer of abstraction, there may be some new low-hanging fruit. Whether this is doable through orchestration or through carefully guided HITL by various specialists in their fields - or maybe not at all! - I suspect will depend on which domain you're operating in.