Nice comment. I really believe strongly that the fast iterations that python allows for is why companies are so successful. The argument that language x does not scale is a bit naive to the fact that they got to the point where they have enough users to make scaling an issue. Go is wonderful and I love programming in Go, but I would choose either python or node for web apps that require fast iteration. I believe that when offering services over the cloud, utilizing multiple languages for well built individual components is a great approach.