One and a half years after the RDA session in Helsinki, the five ESFRI cluster projects, the RDA community, and European Open Science Cloud (EOSC) representatives come together again, to discuss the past, present and future of their collaboration during the journey of integrating thematic services into EOSC. The debate will look at the commonalities and collaboration in the ESFRI clusters, when contributing to the European Open Science Cloud on three pillar topics: