Im going to be the in the minority here but I didnt like the film much. The Leto character is terrible and likely my biggest issue. Ive not read much on this thread but has anyone brought up the missed opportunity plot device to drive K to make a choice between the ending we have and his yearning to transfer Joi into a living replicant? If he was driven by inner conflict for his own gain and want, by making Joi into a real person, it would have likely kept me interested. Instead he is told what he is and just accepts it with only a memory implant as conflict. He obviously was never a child, being a replicant, so how could anyone buy into the "youre special Joe" mumbo jumbo? If we have K discovering how memories are implanted as we did see how they are created, why wouldnt he want to transfer Joi into a real person then go on the run with her? To me, its a huge missed opportunity.
Now, onto the child.
This is something long ago I brought up to a good friend thats also a huge BR fan, what if Rachael, being a one off, was made with human transplant organs? This would be why she had no expiration date as she was an experiment to see how long those organs would survive in a replicant. Fast forward all these years later and we somewhat get that as she birthed a child and died in the process. This could even be a business venture for Tyrell as the new four year life span replicants, Nexus 7, would yield a plethora of readily available healthy cloned human organs. Instead of a hunk of dead meat after four years thats discarded, Tyrell Corp would have a cash cow explosion "reprocessing" that meat.