It still might not be a great idea for Google to routinely shut down APIs in favor of other APIs if they want people to actually rely on its cloud services. It doesn't look like Google is interested in trying to make the migration particularly easy either:

> Q: What will happen with my existing models?

> A: You must recreate your existing Prediction API models using Cloud Machine Learning Engine. To learn more, please read our documentation about creating models on Cloud Machine Learning Engine.