David M. Lentz discusses the importance of comprehensive monitoring of Amazon Elastic File System (EFS) using Datadog to ensure full visibility into application health and performance. By integrating EFS with Datadog's AWS monitoring tools, users can visualize EFS metrics, receive alerts on activity and performance, and collect logs to understand the broader context of their AWS environment. The platform allows for the correlation of EFS data with metrics from other AWS services and technologies, thereby providing a more complete picture of system performance. Datadog's capabilities include automatic tagging, customizable dashboards, and anomaly-based alerts, which help to identify and address potential issues proactively. Additionally, the integration of EFS logs into Datadog via Kinesis Data Firehose further enhances the ability to explore and analyze data across the technology stack.