That's the thing about bubbles: it doesn't mean that the thing is useless, just that its value is inflated. We still have websites after the dotcom bubble burst, certainly we still have housing despite several bubbles bursting there. I would be surprised if LLMs go away entirely. OpenAI and Anthropic might not survive, but Google and Microsoft will continue. God only knows what will happen in China. Local models will still be OK. The broader concepts of machine learning, deep learning, big data etc have been useful for far longer than this bubble and will continue.