You didn’t continue far enough down the hierarchy to find the places where microservices actually work. Honestly if you’re just calling a remote endpoint whose URL is embedded in your codebase and with the hard coded assumption that it will follow a certain contract you’re not moving down the binding hierarchy at all - you ‘re somewhere around ‘dynamic library loading’ in terms of indirection.

It gets much more interesting when you don’t call functions at all - you post messages. You have no idea which systems are going to handle them or where... and at that point, microservices are freeing.

All this focus on function call binding just seems so... small, compared to what distributed microservice architectures are actually for.