What consequences may arise if the SOLID principles are not followed when designing a system?

If you do not follow SOLID principles in system design, the following problems may arise:

• Difficulty in maintaining and extending code: The code becomes tangled and hard to modify, as components are tightly coupled and depend on each other.
• Low reusability: Due to lack of responsibility separation and high coupling, classes and modules are difficult to reuse in other parts of the project.
• Increased risk of errors: Changes in one place can unpredictably affect other parts of the system, complicating testing and debugging.
• Difficulties in teamwork: Poorly structured code hampers understanding and collaborative work.

In the end, ignoring SOLID leads to creating 'rigid' and fragile code that is hard to support and develop.