The text discusses the differences between Legacy, Agnostic, and Kubernetes-Native API Gateways. It highlights that while Legacy and Agnostic gateways can work with Kubernetes, they may not fully leverage its features or require additional infrastructure and manual configuration for optimal performance. In contrast, Kubernetes-Native API Gateways are purpose-built to operate within Kubernetes clusters, providing automatic service discovery, intelligent routing, fine-grained control over traffic and security policies, enhanced observability, and seamless integration with other Kubernetes tools. The author emphasizes the importance of choosing a Kubernetes-Native API Gateway like Ambassador Edge Stack for running services in a Kubernetes environment due to its built-in reliability, availability, scalability, and advanced security features.