Personally, while I see what the author means, I don't agree 100%. What I think is bound to happen is that manual development will lose market share, but not fade away completely. Like stone aqueducts still being needed in some cases despite pipes being a thing, some companies may require proof of work, which could be better achieved with humans. Also, not from a commercial angle per se, but for code reviewers, knowing how to write their own codes would help the oddities in machine-generated code, and fix/improve where needed, meaning at least for study they'd need to do it.