I think that’s a slightly outdated view of the front-end tbh.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.