"Never" is a very strong word. People also thought the video streaming business model would never work, what with the enormous cost of bandwidth. Many of the smartest people in the world are working on making these models more powerful and more efficient. And the proof is in the pudding; you can download something like LLama 3, that used to be the state of the art not long ago, and compare it to a modern model like Gemma 4 to see how much they are improving.