This has not been my experience. I have seen plenty of people with generic backend/full-stack keep their jobs, while my Linkedin is full of impacted infrastruct

This has not been my experience. I have seen plenty of people with generic backend/full-stack keep their jobs, while my Linkedin is full of impacted infrastructure, security and data engineering specialists. Although I do agree that the developer world is becoming increasingly commoditized, I do not think that specialization is really the way to escape it.