This makes no sense. In order to build a service, you need a library (or something very much like it) supporting it.

If you need a library, and can use a library, yay, you're done, it's the simplest and fastest thing possible. If, for some reason, the logic you need can't be run locally, then you need a service. Find or build one and use it. You will pay in application complexity, dealing with the possibility that the service is down/unreachable. You will also pay in latency.

Why is this "not even wrong" article at the top of Hacker News?