Opinion The days when you could jump from one frontier AI model to another at the drop of a hat are going away as vendor lock-in starts to kick in, and prices increase. Once upon a time, say last month, people thought nothing of jumping from one AI frontier model to another. One week, the hottest AI model was Gemini 3.1 Pro, then it was Claude 4.6, now, maybe, it's GPT-5.5. Next month? Who knows. That's fine for Joe Amateur Programmer, but for Janet Pro Programmer, it's another story. You see, e...