You can now mention other members in issues to facilitate teamwork and collaboration, allowing them to receive notifications via email and be subscribed to the issue. Team members will also see why they are receiving notifications by searching for "subscribed:me" in their issue dashboard, and can manually unsubscribe from any issue at any time. This new feature enables seamless collaboration across different projects and technologies, such as React, Django, and Rails, using Sentry's error tracking capabilities.