Why is it important to follow modularity in Angular?

Modularity in Angular is important for several reasons:

1. Code organization - the application is split into logical parts, each responsible for specific functionality. This makes the code easier to understand and maintain.
2. Reusability - modules can be plugged into different parts of the application without duplicating code.
3. Dependency isolation - services and components in one module do not interfere with others, reducing the risk of conflicts and bugs.
4. Loading optimization - lazy-loaded modules let you load code only when it's needed, reducing application startup time.
5. Easier testing - small modules are easier to test because they have a limited area of responsibility.

Modularity makes a project scalable and manageable, even as the application grows.