This April 2025 ClickHouse newsletter highlights several key developments and updates, including the release of version 25.3, which introduces a query condition cache for improved performance in dashboarding and observability use cases. The newsletter also shares insights from CloudQuery's six-month experience with ClickHouse, highlighting its speed and scalability benefits. Additionally, ClickHouse has acquired HyperDX, a fully open-source observability platform, to strengthen its offerings. Other notable mentions include the integration of Rust into the ClickHouse codebase, improvements in scaling mechanics for ClickHouse Cloud, and various community-driven projects such as QuerySight and Anthropic's Model Context Protocol. The newsletter also features a spotlight on Julian LaNeve, CTO at Astronomer, who shares his experience with ClickHouse and its benefits for data observability.