Never heard and never used this feature of Angular v16.
Normally frontend is is just frontend sending requests to the backend and displaying results. But last month I wanted to use a standalone frontend app which could take input as parametrized URL. It was a little challenging. This new feature seems a better way of doing it. But again, frontend is usually just there to display results from the backend.
I think that’s a slightly outdated view of the front-end tbh.
SPAs and PWAs are becoming a lot more popular and don’t require a backend to have fully functional sites.
PWAs don’t even need a connection.
Obviously many websites are useless without a backend. But things like text editors or painting apps don’t need the frontend.
And with wasm gaining more use you can use a lot more languages and more easily create very complex apps.