> no new language/framework/library will ever be able to emerge?
Here is a Youtube video that makes the same argument. React is / will be the last Javascript framework, because it is the dominant one right now. Even of people publish new frameworks, LLM coding assistants will not be able to assist coding using the new frameworks, so the new frameworks will not find users or popularity.
And even for React, it will be difficult to add any more new features, because LLMs only assist to write code that uses the features the LLMs know about, which are the old, established ways to write React.