LLMs are the end-game for almost all NLP and CV tasks. You can freely specify the task description, input and output formats, unlike discriminative models. You don't need to retrain, don't need many examples, and most importantly - it works on tasks the developers of the LLM were not aware of at design time - "developer aware generalisation". LLMs are more like new programming languages than applications, pre-2020 neural nets were mostly applications.