The retirement of Ingress-NGINX in March 2026 forced thousands of platform teams to finally confront a migration they had delayed for years. While Gateway API was positioned as the natural successor, the transition exposed deep architectural mismatches between how organizations actually operated Kubernetes networking and how Gateway API expected ownership to work. What looked simple on conference slides quickly turned into one of the most frustrating infrastructure migrations many Kubernetes engineers had ever experienced. The End of an Era For nearly a decade, Ingress-NGINX quietly became the backbone of Kubernetes networking. It was everywhere. Startups used it because it was easy to deploy. Enterprises standardized on it because it was flexible. Managed Kubernetes platforms built integrations around it. Helm charts assumed its existence by default. Entire platform engineering practices evolved around the operational habits that Ingress-NGINX created.…