Right, I understand that, but I was just commenting that it is odd they didn't built it on top of Nginx. I would have expected that rather than switching to Envoy.
Envoy has a proven track record in Mesh deployments, whereas in NGINX those primitives have to be built from scratch. On the other end, NGINX has proven track record as an Ingress Gateway and therefore it is the natural technology as an APIM solution.
