As you inadvertently pointed out, AI improvements are not linear. They depend on new discoveries more than they do iteration. We could be in either out of jobs or lamenting the stagnation of AI (again).
From your comment, is sounds like you think that the implementation phase of LLMs is already over? And if so, how do you come to this conclusion?
What further implementations of integrating AI and programming workflows have LLMs shown to be missing?