Which SOLID principles do you consider most important and regularly apply in your practice?

From the SOLID principles, I most often apply in Flutter practice:

• S (Single Responsibility Principle) — each class or widget should have one responsibility. This simplifies maintenance and testing.

• O (Open/Closed Principle) — classes should be open for extension but closed for modification. In Flutter, this helps create extendable widgets and services.

• D (Dependency Inversion Principle) — dependencies should be built through abstractions, not concrete implementations. This makes testing and replacing components easier.

For example, for state management, I often use dependency inversion patterns, which allow easy swapping of implementations without changing the code that uses them.