A trend of comments I see whenever App Engine is mentioned is how limiting App Engine platform is and how it doesn't have MySQL, etc. No one seem to ever mentio

A trend of comments I see whenever App Engine is mentioned is how limiting App Engine platform is and how it doesn't have MySQL, etc. No one seem to ever mention scalability? App Engine is built for just that! Datastore is infinitely salable so is the application and every other API on GAE. I can spend an hour writing an app from scratch that scales infinitely on GAE without a thought. I personally do not know of any other PaaS (e.g. Openshift, Heroku) that's capable of doing that unless you spend a month learning ins and outs of devops for that particular platform. EDIT: Also the Datastore is replicated in multi data centers and again, you don't have to think about backups either.