A normalized cache in GraphQL can provide instant navigation to detail pages and save bandwidth, but it introduces complexity as the frontend developer must understand the domain and program the cache correctly. This can lead to unintended behavior if data is stale or not properly invalidated. In contrast, WunderGraph caching uses a single source of truth - the Operation Definition - making it easier to implement and maintain, with automatic handling by the browser and no need for custom rules for cache eviction. However, this approach may require more requests than normalized caching, potentially introducing unnecessary complexity for most use cases. Ultimately, a normalized cache is not always necessary, and WunderGraph provides a simpler alternative that can be used when performance is an issue.