Clarifying TypeScript: Type and Interface Beyond the Surface

TypeScript developers often default to oversimplified heuristics when choosing between type and interface, missing that they're functionally equivalent for the majority of use cases. This article exposes the specific technical gaps—union types and declaration merging—that actually matter, empowering developers to make deliberate architectural choices instead of following convention. Distinguishing when each truly applies is essential for writing more scalable and maintainable TypeScript codebases.