Archipelago is an open source repository system developed by the Metropolitan New York Library Council (METRO). Conceived 2 years ago as a response to our communities’ need (New York State) to lower the technological barriers of using and maintaining such systems and our experience maintaining and developing other open source repositories, Archipelago has come a long way, from a simple idea to many successful implementations. A long planning process turned into a formal road map guided the development of a novel paradigm, coded for, and supported by, a diverse and caring community. This presentation is about multi sided Openness, a tale of rethinking our historical notions of what domain driven systems are, of stepping back, of giving users the tools for building on their own practices, of removing ourselves (developers) from imposing preconceived shapes data and media should have. In an evolving and constantly shifting domain, we provide means that support local, identity driven workflows, enabling exploration and iterative actions leading to making knowledge open, for human and machine consumption. It's also a story that started during OR2018 and so we feel it’s fair it's told 3 years after in the same place.