I am currently writing a client to a synchronized application system, and you only really notice how it’s layers upon layers when you write custom functions to serialize/deserialize primitive data types to a raw socket, and then on the next layer already can just abstract and write objects first to a HashMap, and then use the HashMap serializer for sending the actual object. And then you go yet another layer higher and use reflection to automatically sync method calls.

It’s really crazy to think about it.