To me what was interesting about the article was moving the whole process from a paid service on the net with all the associated security issues (as well as corollary environmental issues) to a local instance of a curated LLM(s) residing on a computer isolated from the net in your office. It was demoed in this video Building a ‘Second Brain’: Opportunities, Risks, and Implications for AI Adoption in Singapore
AI is not going away, you just have to be adaptable and learn how to use it as the tool that it is. THe limits will be dependent on your imagination and creativity.