Docker Buildx is a powerful Docker CLI plugin that enhances the traditional Docker build process by leveraging the BuildKit backend, allowing developers to build container images across multiple CPU architectures without the need for emulation. By using familiar syntax, Buildx serves as a drop-in replacement for the older docker build command while offering advanced functionalities such as multiplatform and multinode builds. This capability enables developers to create images that are compatible with diverse environments, including AWS Graviton and Apple silicon MacBooks, thereby increasing build efficiency and flexibility. Buildx uses interchangeable drivers to facilitate building images on different architectures, and it integrates tools like imagetools for inspecting image manifests. The article also highlights Earthly as a tool to further improve build efficiency and reproducibility, promoting consistency across various development environments.