[sand_man]

I guess we can all walk away with different interpretations.

I thought the entire plot twist hinged on the fact that K wasn't the offspring of Rachel and Deckert. And that the memories he had, which led him to believe he was (or might have been), were really implanted by the actual and true offspring...the memory maker. Even in her own words she indicated something about every artist leaving a little piece of themselves behind. And maybe more than one replicant had this same memory.

If you think about it, K was no longer needed after he brought them together. He just laid on the steps out front...mission accomplished.