Everyone talks about SOLID principles. Your senior dev mentions them in code review. Your architecture docs reference them. But why do actual projects become unmaintainable garbage despite teams “knowing” SOLID? The answer: understanding SOLID and actually building with it are two completely different things [1].
Most developers learn about SOLID early, nod along, then immediately violate these principles the moment a deadline hits. Let me show you where the rubber meets the road — and why it’s harder than it sounds.