In the enterprise space this concept is thriving and doing well. For example, SnapLogic has been building enterprise integration technology that can easily tie

In the enterprise space this concept is thriving and doing well. For example, SnapLogic has been building enterprise integration technology that can easily tie hundreds of different data sources together using pre-built or custom components using a GUI or programmatically. In order to become a critical part of business infrastructure it needs to be a professionally supported and maintained product. Yahoo Pipes was just an experiment and not a serious business so people never built anything serious on top of it that would pay for the underlying maintenance and infrastructure.