Around 2016, the term "serverless functions" started to take off in the tech industry. In short order, it was presented as the undeniable future of infrastructure. It's the ultimate solution to redundancy, geographic resilience, load balancing and autoscaling. Never again would we need to patch, tweak or monitor an application.
Classic example of the Hype Cycle.
People need to figure out the perfect use cases for the tech first, and in this case it was being applied to way too many.