Microsoft has announced that it is going to fork and extend Node.js, leading developers to express concern over what the move means for the long term future of Node.js. Historically (think Java), things have not always gone that well when Microsoft decides to fork and extend a technology.
As various services like Facebook deal with competitors by packing more functionality into their apps, those apps are increasingly experiencing usability issues. In the old days of the API economy, outside developers could leverage a service's APIs to build something better. But those days are gone.