Nicolas Bustamante argues that the traditional "interface moat" in software is collapsing, primarily due to the rise of large language models (LLMs) that can function as a universal interface. For decades, software companies leveraged complex workflows and specialized interfaces to maintain pricing power. Users invested time to master these systems, creating high switching costs. However, Bustamante suggests that as LLMs become the primary means for knowledge workers to interact with data, the need for specialized software interfaces will diminish. The article references Ben Thompson's Aggregation Theory, which illustrates how power shifted from distributors to aggregators as distribution costs fell. Traditionally, suppliers retained control over their brand, user experience, and data. This control allowed them to maintain a competitive edge. Bustamante points out that as LLMs commoditize the interface layer, the focus shifts entirely to the data itself. Users will no longer engage with the supplier's brand or interface, leading to a stark change in how software is perceived and used. The implications are significant for various industries where specialized software currently commands high prices. Legal research, medical databases, real estate analytics, and recruiting tools are all vulnerable. As LLMs streamline access to data without requiring users to interact with cumbersome interfaces, the value of those interfaces will evaporate. Companies that rely solely on their interfaces for revenue will struggle unless they possess unique, proprietary data that cannot be easily replicated. The shift towards APIs and structured data will redefine the supplier landscape, making traditional software stacks obsolete.