This document discusses different approaches to platform as a service (PaaS) and what is missing from current offerings. It summarizes the control assumptions of Google App Engine, Heroku, and AWS Elastic Beanstalk. While these services provide simplicity, they can limit control and productivity. The ideal PaaS would be open, non-intrusive, and extensible, allowing any stack and cloud with user-defined auto-scaling rules. However, few businesses have been able to fully migrate applications to the cloud due to its challenges. The document promotes Cloudify as an alternative PaaS solution.