Software architecture and modularity are not static, but rather dynamic and evolving aspects of your software system. As your system grows and changes, it is important to monitor, review, and refactor your architecture and modularity to ensure they meet the current and future needs and expectations. To do this, you should follow the principles of software design, such as SOLID, DRY, and KISS, to improve the quality, readability, and maintainability of your code. Additionally, you should follow the best practices of software engineering, such as coding standards, documentation, testing, and version control, to improve the consistency, reliability, and collaboration of your code. Furthermore, you should follow the patterns and anti-patterns of software architecture, such as MVC, REST, or monolith, to improve the suitability, scalability, and performance of your system. Finally, you should follow the metrics and indicators of software architecture and modularity, such as cohesion, coupling, complexity, or modularity index, to measure and improve the effectiveness, efficiency, and flexibility of your system.