zerolog

The ConsoleWriter for human-readable output is explicitly labeled as inefficient, making it unsuitable for production use where both readability and performance are required.

Zerolog does not deduplicate fields, which can lead to multiple keys in JSON output and potential parsing issues in log consumers.

UpdateContext is not concurrency-safe, requiring careful use of child loggers with the With() method in concurrent environments, adding boilerplate code.

Forgetting to call Msg or Msgf at the end of a chain results in no log output without compile-time errors, leading to silent failures and debugging challenges.