What are two benefits of Extensibility in application design?

The choice highlighting performance and usability gains along with enhanced application flexibility clearly points to crucial advantages of extensibility in application design.

Extensibility allows applications to be adapted and enhanced over time without requiring significant updates to the core system. This means that new features can improve performance and usability, ensuring that users continue to have a seamless experience as their needs evolve. For instance, by easily integrating new tools or functionalities, developers can optimize the application's responsiveness and overall functionality, leading to improved user satisfaction.

Moreover, enhanced application flexibility means the system can be modified or extended to meet specific requirements or adapt to changing business environments. This adaptability is vital in today's fast-paced technological landscape, allowing businesses to remain competitive by incorporating the latest innovations or responding to user feedback without a complete overhaul of the application.

Other options, while they mention various potential benefits, either introduce aspects that do not directly relate to extensibility or highlight features that could complicate application design rather than simplify it. The key focus on flexibility and performance makes the selected answer particularly aligned with the fundamental principles of extensibility in application design.