How Rails Engines can isolate your monolith without microservices

This is an adapted excerpt from Chapter 1 of Modular Rails: Architecture for the Long Game , my book on building maintainable Ruby on Rails applications using Rails Engines. "The goal of software architecture is to minimize the human resources required to build and maintain the required system." -- Robert C. Martin, Clean Architecture The Cost of Change Over Time Every Software Engineer that uses Ruby on Rails has lived this story. The application starts small. A handful of models, a few control