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Cat Morris and Jake Klein’s KubeCon EU 2025 talk in London  is a practical walkthrough of what happens when a “simple” Kubernetes setup grows into a full platform estate, and an exploration of the challenges that working with multiple clusters brings. They frame the problem with a familiar story: platform complexity rarely appears overnight. It creeps in, one sensible decision at a time.

A Red Hat survey of 600 DevOps and security professionals found that 40% of organisations experienced Kubernetes misconfigurations in the past year. Over a quarter of respondents flagged access control issues, including RBAC, as high-risk security threats. In this context, understanding how to use ClusterRoles and ClusterRoleBindings safely and effectively is critical. This guide walks you through practical usage patterns, complete with hands-on examples you can test in your