> Probably just the interface - function calls become RPC. Network calls introduce new failure modes and challenges which require more plumbing. Can I retry t

> Probably just the interface - function calls become RPC. Network calls introduce new failure modes and challenges which require more plumbing. Can I retry this RPC call safely? How about exponential backoff? Is my API load-balancer doing its thing correctly? We'll need to monitor it. How about tracing between microservices? Now we need OpenTelemetry or something like that. How harder is it to debug with breakpoints in a microservice architecture? How can I undo a database transaction between 2 microservices? Suddenly your simple function call just became a lot more problematic.