[justicezyx]

> a single (or small set) of customers (Google, Youtube etc)

Well, the applications inside Google are equally diverse compared to applications running on AWS, or at least on the same level. Google's infrastructure is used for an extremely wide range of use cases, from running a shell command remotely, to support planetary deployment of world's largest customer-facing applications.

It was not designed for simple or uniform use cases. Actually, it is impossible to design something that is simple and uniform, and at the same can support Google's growth on the way.

Your examples, Google (search), youtube, are actually examples that have extremely diverse requirements across their entirely tech stack. In fact, many of its requirements cannot be supported in any existing public Cloud providers.