I agree with the article in general when it comes to NLP, AI and the dull hype machine. But in certain domains well understood usage patterns in conversational interfaces have advantages over custom UI's. Conversational interfaces with micro UX elements, maps buttons images selectors ..., rather then text input. They advantage is a universal timeline. Be it booking a table in restaurant, ordering a car, searching for an article, all conversational interface allow you to go back in time in a uniform well understood way. By scrolling back. Also your interaction history is searchable. No need to introduce a new UX element for that.