• The new form of Open Core, or how everyone was right | carlodaffara.conecta.it - In this sense, the “real” part of open core (that is, the exclusive code) is becoming less and less important - three years ago we estimated that from a functional point of view the “old” open core model separated functions at approximately 70% (the OS edition had from 60% to 70% of the functions of the proprietary product),