If you considered PostgreSQL as a cloud platform it has some useful properties. A well understood API that is consistent across different products. Built in authorisation and authentication. Reliable data storage without having to think to much about the underlying hardware. Triggers that allow activity in one product to initiate a process in another. Support for running sandboxed code in several languages without needing a "server". And you even have some benefits. Your entire infrastructure can be dumped to a file. The infrastructure can be altered in a transaction that can be rolled back. And external services can be integrated as first class citizens (more or less).