The September edition of "What's New in ClickStack" introduces several advancements for the open-source observability stack centered on ClickHouse, enhancing both functionality and user experience. Key updates include the ability to import and export dashboards via HyperDX, facilitating easier sharing and customization while maintaining compatibility through versioned JSON files. The release also enables custom configurations for the OpenTelemetry Collector, allowing users to modify its settings to better suit local deployments and specific monitoring needs. Additionally, the update expands analytical capabilities by allowing users to bypass standard aggregation types and directly utilize ClickHouse's extensive array of functions, thus supporting more in-depth data analysis. Performance improvements are highlighted by the introduction of time-window chunking, which optimizes query execution to prioritize recent data and reduce system load. The addition of a delta function for gauge metrics aligns with Prometheus’s behavior, enabling detailed tracking of changes over time, such as memory usage fluctuations, which can signal potential issues like memory leaks. These enhancements collectively aim to deliver a more powerful and seamless experience for ClickStack users, supported by contributions from a vibrant open-source community.