Sentry has introduced features to improve JavaScript applications, including performance monitoring and support for Google Web Vitals. This helps developers identify bottlenecks in their application and understand how users are experiencing the site. Sentry also provides an early warning system called Release Health, which reports on crash-free sessions, crash-free users, version adoption, and new issues introduced in a release, allowing teams to determine whether to roll back or address minor issues. Additionally, Sentry's insights tool, Discover, enables developers to track release trends, errors, and performance data across all projects, facilitating continuous improvement of their code.