Agile methods have become the norm for small and co-located development projects in many countries. The benefits of these methods have inspired use also in other settings such as large-scale development projects. In this presentation, we will present ongoing work from two exploratory case studies of development projects with more than four development teams over several years. Is advice in agile methods sufficient for coordinating teams and for scaling large projects? In our presentation, we discuss some possible limitations of current knowledge and practice based on smaller projects and teams as a grounding for coordinating across teams and for scaling large projects.