ClickHouse Cloud has achieved a fully stateless compute architecture by introducing a new in-memory database engine powered by a Shared Catalog, effectively removing the dependency on local disks. This transformation began with the decoupling of data storage from compute using the SharedMergeTree table engine, which utilizes shared object storage for data, and the adoption of a distributed cache to mitigate object storage latency. The final step involved decoupling metadata from local disk storage through the Shared Catalog, enabling stateless compute nodes to operate without disk dependencies. This architecture supports cloud-native elasticity, resilience, and correctness, with capabilities such as atomic DDL operations and seamless integration with external data formats like Iceberg and Delta Lake. The system now allows fast, diskless provisioning and promises a future of serverless computing, enhancing both performance and scalability.