Stop Using Cosine for Everything: 5 Distance...

Everyone uses cosine similarity. Tutorials use it. Frameworks default to it. If you ask "which distance metric should I use?", the answer is always "cosine, probably." But here is the thing: your vector database supports other metrics. And those metrics unlock use cases that cosine literally cannot handle. This is not a math lecture. This is a practical guide. Five metrics, five real-world problems, working code you can run in two minutes. By the end, you will look at your vector database differ