The Operational Overhead of Migrating from Monolith to Modular

Moving from a monolith to microservices can improve scalability, but it also brings major operational overhead.

Networked service calls, service discovery, and distributed transactions add complexity that simple modularization often hides.

Teams need stronger automation, deployment pipelines, monitoring, and logging to keep the system reliable.

A refactored ERP example showed that delayed-order debugging became much harder until trace IDs and an ELK stack were added.