And yet ChatGPT does not use it.
GP was mentioning that a solution to the problem exists, not that Netflix specifically invented it. Your quip that the technique is not specific to Netflix bolsters the argument that OpenAI should code that in.
They didn't actually name the solution: the solution is virtualization.
They described Netflix's implementation, but if someone actually wanted to follow up on this (even for their own personal interest), Dynamic HTML would not get you there, while virtualization would across all the places it's used: mobile, desktop, web, etc.
I'm ignorant of the tech here. But I have noticed that ctrl-F search doesn't work for me on these longer chats. Which is what made me think they were doing something like virtual scrolling. I can't understand how the UI can get so slow if a bunch of the page is being swapped out.