This is true, although I'd replace "multiple projects" with "multiple applications" as you can most definitely create highly modular applications using SBT sub

This is true, although I'd replace "multiple projects" with "multiple applications" as you can most definitely create highly modular applications using SBT sub projects. The dirty *nix hack for this is to symlink the shared library; otherwise, converting the lib to a plugin is one way toward creating reusable cross-application libraries.