RAGs do not prevent hallucinations nor does it guarantee that the quality of your output is contingent solely on the quality of your input. Using LLMs for legal use cases for example has shown it to be poor for anything other than initial research as it is accurate at best 65%:
https://dho.stanford.edu/wp-content/uploads/Legal_RAG_Halluc...
So would strongly disagree that LLMs have become “good enough” for real-world applications" based on what was promised.