The Cognixia podcast discusses the latest update from Microsoft in Power BI, enabling users to write DAX queries via the web interface. Previously only available in Power BI Desktop, this feature allows users to create calculations, build models, and perform advanced data analysis. DAX (Data Analysis Expressions) is highlighted as a powerful tool for extracting insights from data through custom measures and statistical analysis. However, limitations remain on the web version, such as disappearing queries and the inability to save them like in the desktop version. Future updates are anticipated to enhance web features further.