Gremlin's 2021 State of Chaos Engineering Report reveals that feature management is crucial to safer deploys and minimizing the impact of failures in software development. The most common causes of incidents are bad code pushes and dependency issues, with top-performing organizations using circuit breakers and selective rollouts to maintain high availability. Monitoring plays a key role in identifying anomalies and ensuring optimal feature performance. Feature flags enable testing in production and allow for quick disabling of features if problems arise after deployment.