When it comes to modular development, extensibility is something to constantly think about. Writing a code that locks itself in will likely result in a future failure to integrate it with other projects or libraries. While SOLID design principles might look like an overreach for some of the parts, actively applying these principles is likely to result in components that are easy to maintain and extend over time.
Embracing the SOLID principles for class design prepares our code for future changes. It does so by localizing and minimizing these changes within our classes, so any integration using it does not feel the significant impact of the change.
Moving forward, in the next chapter, we will look into defining our application specification which we will build across all other chapters.