Its funny how most languages have this whole separating between microservices and monoliths. Having worked with elixir for the last 5 years, One of its biggest benefits is the ability to have a microservice deployment while having a monolithic codebase.

It comes with a reasonably good internal pubsub system and vm linking right out of the box. And the built in application supervisor makes it trivial to spawn thousands of threads on one machine, each with their own independently allocated heap, that can be mounted under a supervision tree.

Want to create a microservice? just make a file, inherit the GenServer and add it to your application tree in your application.ex. Add a library like horde and you can create singletons in your codebase that are microservices. they run as a thread somewhere in your cluster. Just send it a message by nmae and the vm will know where to deliver it.

The end result is the overhead of creating and maintaining a microservice in elixir is about the same as the overhead for adding a new controller.