Docker is incredibly good at caching, the assumption that Docker is slow is incorrect. The first time you build or pull an image on a machine, it might take a f

Docker is incredibly good at caching, the assumption that Docker is slow is incorrect. The first time you build or pull an image on a machine, it might take a few to get the base images, but past that it is lightning fast, and it works the same for any language and any stack. For most companies that operate several services, having one trusted and strong way to deploy and orchestrate is way more important than an occasional load/build time when working on a new laptop / instance. Edit: I'm not saying Capsule isn't useful, it just doesn't make any sense to say it compares to Docker, because the use-case is quite different in reality.