I'd still want to see the entire response all at once. Having it stream in while I read it would be very distracting and make it difficult for me to read.
The website could as well buffer the incoming stream until the used clicks an area to request the display of the next block of the response, once he has finished reading the initial sentences.
LLM streaming must be a cost saving feature to prevent you from overloading the servers by asking to many questions with in a short time frame. Annoying feature IMHO