This is an era of ecosystems. Everyone wants all their things to be at one place, and there is absolutely nothing wrong with it as, if we get all that we need at one place, it becomes quite easy to manage our stuff. Consider an example of the supermarket; we like to go to the supermarket instead of individual store keepers as we get all that we need at one place. The same is the case with technology, we normally prefer to use libraries from some particular companies only, because it provides great compatibility, ease of integration, and ease of moving from one component to another as the same conventions and styles would be used to develop it.

When Amazon understood this need, they started offering a variety of technologies as a service on cloud. For example, they started with S3; then, they realized offering EC2 instances would also be a good idea and since then their offering stack is evolving every day. Right from the relational...