Temporal's exploration into building Temporal Cloud emphasizes the importance of rethinking traditional architecture and operational strategies to deliver reliable and scalable managed cloud services. By opting for a multi-tenancy model, Temporal optimizes resource usage and allows customers to pay for actual usage, which contrasts with the inefficiencies found in single-tenancy models. The architecture is divided into data and control planes, with a cell-based approach ensuring high availability and failure resilience by isolating resources. Temporal's durable execution model simplifies complex tasks within the control plane by decoupling business logic from state management and failure handling, allowing workflows to automatically manage retries and errors. This model enhances developer productivity and reduces the complexity of managing long-running processes, contributing to a more robust and scalable cloud service. Temporal's approach, which has been applied across multiple cloud providers like AWS and GCP, underscores the potential of durable execution as a paradigm shift for building cloud-native systems.