Most developed countries are already worried about declining birth rates (many are already below replacement rates). The rise of AI companions is going to absolutely drop the bottom out of even the most pessimistic birth rate outlooks. It's easy to imagine a future where the majority of all young people give up on trying to establish real relationships and just resort to AI companions for the cheap and easy dopamine.…
The comic book Marvelman has Marvelwoman invent the ultimate A.I. algorithm to help people find romantic partners.
The latest William Gibson novel has a benevolent A.I. tell people things like
"Your Mom just woke up, I can tell because she's scrolling Twitter. You should give her a call."