The advantage of small systems
A system is easier to trust when its important behavior fits inside a single mental model.
Small does not mean unfinished. It means each component has a clear job, dependencies are deliberate, and the path from request to result remains visible.
Visibility is a feature
When operators can name every boundary, they can also identify which evidence is missing. Logs become more useful, alerts become more specific, and routine maintenance becomes less risky.
Complexity should earn its place
A new layer is worthwhile when it removes more uncertainty than it creates. Otherwise, a direct implementation with good observability is usually the more resilient choice.