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Automatically updates cache entries before expiration using a configurable threshold window, ensuring fresh data is always available without serving stale entries by default, as highlighted in the README's philosophy.

Prevents thundering herd problems by debouncing concurrent update requests for the same key, reducing redundant database calls and I/O load in highly concurrent environments.

Allows integration with custom or external cache stores via a simple interface, providing flexibility beyond the default in-memory LRU cache from Hashicorp.

Offers options like 'ServeStale' to serve expired cache during background refreshes, balancing performance and consistency for less critical data, as specified in the configuration.