I remember when Facebook was just a massive PHP monolith that every developer loved to complain about. We used to joke about how much duct tape was holding the news feed together. Fast forward to today, and they are dropping multi-billion parameter language models on GitHub, shipping custom silicon to their data centers, and completely upending how we build software.developers must understand fundamental architectural frameworks, starting with a clear answer to What is Meta AI and how its open-weights strategy modifies market dynamics. By distributing model weights directly to the public, the ecosystem is shifting from an API-renting economy to an open-source ownership model, driving down unit economics across the board.