Plenty room for more (concurrent) layers, too! I've only recently embraced using multi-stage build to concurrently split a build in two to four steps * (one o

Plenty room for more (concurrent) layers, too! I've only recently embraced using multi-stage build to concurrently split a build in two to four steps * (one or more) fetcher, for fetching (say) the source package or cloning a git repo in the proper commit/branch, or having external dependencies whose output could be cached regardless of the rest of the dockerfile contents * builder, which uses "COPY --from=fetcher" to "bring over" the code or dependencies * the actual resulting image, which oftentimes could well be a "FROM scratch" and be just comprised of "COPY --from=builder" instructions. With "docker buildx", or with "DOCKER_BUILDKIT=1 docker build", it's pure joy to use!