I've personally been using a Phoenix LiveView-like approach extremely successfully, combined with LLM coding. It is extremely, stupidly fast. We are talking about loading an entire multi-window desktop environment in the web on spotty 5G networks in half a second, transferring less than 1MB of data.

I think traditional web frontends might be dead for any applications with servers that can afford to keep server-side state of a logged-in user.

(Notably this includes almost any kind of AI application, because the LLM costs dwarf the web hosting costs anyway.)

And for the stateless ones, there's always htmx