It's a short comment so it's easily misunderstood
He probably means that due to compliance and security and so on, data leak risks etc, it would never be greenlit to be used because COBOL which is mostly in the financial industry and many other very relied upon infrastructure things, while you could just get advice from chatGPT while coding away for example that wouldn't be allowed because of the proprietary secret nature of the code and the data
Even just internal coding customs if understood by the hypothetical enemy through leaks on prompts with important data that was used to train a newer model, raises the risk of being attacked in a more sophisticated manner
So while it's awesome that tools are started to be built, and I wished there was more of it while working on the same thing, there is a whole lot of analysis on if a tool is even allowed to be used while still being compliant with all of the various regulations that have to be followed both in working style and security and data protection