I've been using App Engine for many years to develop web apps at Google. Most of the open source projects I've worked on use it for its simplicity and scalability. A couple of examples are the Google I/O web app, the Chrome team's Chromestatus.com, Polymer's site, developers.chrome.com, and WebFundamentals, just to name a few. Heck, I'm even using it to build my wedding website! I could say a ton

