Node.js Streaming in Practice: Creating ChatGPT-Level Response Experiences

As an indie developer or a member of a small team, what is the most dreaded feedback when developing AI applications?

It's not "the feature isn't easy to use," but rather "why is there no response yet?"

In the traditional HTTP request mode, calling a Large Language Model (LLM) often implies a long wait. Users stare at a blank screen, waiting for the model to generate hundreds of words of content. This experience is a disaster on mobile devices or in unstable network environments. This is also why almost all mainstream AI chat applications have adopted the "typ