Not sure I get the author of this piece. The tech leaders are clearly saying AI is inevitable, they're not saying LLMs are inevitable. Big tech is constantly working on new types of AI such as world models.
The interface also allow to comment, post and interact with the original HN platform. Credentials are stored locally and are never sent to any server, you can check the source code here: https://github.com/GabrielePicco/hacker-news-rich.