The Sentry team has shared a retrospective of their 2021 accomplishments, highlighting various product launches, feature enhancements, and technical investments. They introduced new products such as Mobile Performance Monitoring, Review List, and Stack Trace Linking, which aim to help developers monitor app performance in real-time. The company also improved its existing features, including Discover & Dashboards, Automatic Ticket Creation, and Team Stats. Additionally, Sentry made significant technical investments, acquiring Specto, a mobile profiling tool, and converting 100% of their OSS front-end code to TypeScript. They also expanded their support for various platforms, such as Unity and Next.js, and introduced features like No Code AWS Lambda Monitoring and SCIM provisioning. Furthermore, the team gave $155,000 directly to open source maintainers and implemented several user-facing improvements, including Full Semantic versioning support and Change and Crash Rate Alerts.