The Metrics Blindspot: Why Delivery Speed Doesn't Guarantee Code Sustainability

While DORA, SPACE, and LinearB excel at measuring deployment velocity and developer productivity, they share a critical blind spot: none measure whether written code survives long-term in production. Teams can achieve elite delivery metrics while accumulating technical debt, creating a dangerous illusion of engineering health. This gap reveals the industry's urgent need for measurement frameworks that connect delivery performance with actual code durability and maintenance costs.