The speaker, Guillaume, talks about his love for Nix and his desire for everyone to use it. He shares a story about a company's HR employee who needed to process a large amount of data but was unable to do so due to legal restrictions. The speaker used Nix to write a script that could run on the HR employee's computer without requiring access to the data, all through a simple one-liner. Guillaume emphasizes the importance of making Nix more accessible to everyday users by focusing on how it can make their lives easier rather than promoting it solely as cool tech. The Q&A section includes questions about why the speaker uses Windows and why he didn't just use Docker to run the script.