• Functionality might be limited during the preview phase and subject to change when fully launched.
• Optimal utilization depends heavily on an application's reliance on AWS services.
• Hidden costs associated with each dashboard and metric created which can increase expenses significantly.
• Exponential cost increases if numerous custom events are used.
• Dashboard customization options are less advanced than tools like Kibana or Grafana.

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AWS Cloudwatch Application Signals offers seamless monitoring for applications running on the AWS platform. It delivers native integration with AWS services, ensuring scalability, reliability, and ease of use. As a preview release, it offers a cost-effective solution for teams looking to optimize their AWS-based applications.

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• Language/Tech Stack Compatibility: Being an AWS service, it offers the best compatibility with applications using AWS services (EC2, Lambda, etc.) and popular languages they support. 
• Distributed Tracing: Yes, with native integration into AWS X-Ray for tracing analysis. 
• Community Feedback: As a preview release, community feedback is developing. Positive notes include ease of use within AWS and potential cost-effectiveness. Considerations might include limitations for non-AWS tech stacks.
• Seamless integration with AWS services for efficient monitoring.
• Automatic collection and visualization of key metrics, logs, and traces.
• Real-time insights for faster detection and resolution of issues.
• Enhanced application performance analysis with minimal configuration.
• Scalable monitoring to handle applications of any size.
• Customizable dashboards and automated alarms to stay informed about critical issues.

• Docs: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Application-Monitoring-Sections.html
• GitHub: https://github.com/aws-observability/