System Design Interviews Overvalue Diagrams, Undervalue Architectural Trade-offs

A developer writing on DEV Community argues that system design discussions — including technical interviews — place too much emphasis on drawing architecture diagrams while neglecting the critical trade-offs behind design decisions. Key questions such as choosing consistency over availability, or a monolith over microservices, are often overlooked in favor of visual representations. The author contends that in real production environments, these trade-off decisions carry far greater consequence than any diagram. To address this gap, they published a companion article on Medium offering practical examples of real-world architectural trade-offs. The post also invites experienced architects and backend engineers to share trade-offs that have shaped how they approach distributed system design.