A build tool that is not only fast but configured in a type safe way sounds great. I really like this quote from the "Why use scala" part of the documentation:

> Most developers using a build tool are not build tool experts, and have no desire to become build tool experts. They will forever be cargo-culting examples they find online, copy-pasting from other parts of the codebase, or blindly fumbling their customizations. It is in this context that Mill’s static typing really shines: what such "perpetual beginners" need most is help understanding/navigating the build logic, and help checking their proposed changes for dumb mistakes. And there will be dumb mistakes, because most people are not and will never be build-tool experts or enthusiasts