An increment is a slice of value that is finished, tested and ready for the customer to use. It is not "eighty percent done": it is done. When intelligent assistance produces more, and faster, the definition of done becomes the barrier that separates "a lot was generated" from "something of value was delivered". That is why it must explicitly include the human validation of everything generated: assistance can automate the tests, but it cannot sign off completion. The signature is human.
Want to keep pulling the thread? This topic unfolds in Agile Bedrock.