The 5th Management Board Meeting of EcoStack has been held on March 03-04, 2021, unfortunately once more in a virtual format. However, the meeting was very stimulating and productive, giving the chance to assess the very good results achieved, in spite of the restrictions imposed by the Covid-19 pandemic, which slowed down some of the planned activities. We are half way through, and what done so far looks promising for a successful prosecution of EcoStack.