There's currently multiple ingress strategies we support for hosted cluster service endpoints (kas, nodePort, router...).
In a context of uncertainty about what use cases would be more critical to support, we initially exposed this in a flexible API that enables to potentially choose any combination of ingress strategies and endpoints.
ARO has internal restrictions on IPv4 usage. Because of this, to simplify the above and to be more cost effective in terms of infra we'd want to have a common shared ingress solution for all hosted clusters fleet.