A Tangent, but how long before we will see half the population having relationships with their AI assistants like in the sci-fi movie "Her".
Add cutting edge voice synthesis and maybe a realistic video stream in a few years and we're there.
Japan already has problems with the concept of "2d Waifus" and lack of intimacy between the younger generation.
Maybe the downfall will not just be climate catastrophe but hyper isolated people living alone with their ultra realistic bot friends and family without any desire to experience the ups and downs of actual social experience.
Extrapolate a bit and you wont know what's real outside of direct experience. Things are getting crazy!