Abstractions Done Right: Discussing When It Is Worth Or Not

Abstractions like interfaces and layered architectures are valuable when used correctly, not just for replacing implementations but for deferring decisions and isolating concerns. The author advocates for a 4-layer approach (UI, Application, Domain, Infrastructure) that enables vertical development and reduces cognitive load. Two real-world examples demonstrate when abstractions provide clear value (migrating from serverless to Kubernetes) versus when they create unnecessary overhead (simple Step Function tasks). The key is understanding that abstractions' main benefit is enabling focused development and clearer intent, with implementation flexibility as a bonus.