A significant AWS outage on October 19-20, 2025, caused by a DNS failure in the DynamoDB API, led to widespread disruptions across over 140 AWS services, affecting major platforms and clients. The incident highlights the importance of observability in quickly detecting and resolving such failures, emphasizing that organizations using Full-Stack Observability can mitigate financial losses and improve response times during outages. Effective monitoring and real-time visibility into service impacts are crucial for managing risks in cloud environments.