Research e-infrastructures such as EUDAT, EGI, GEANT and OpenAIRE provide universal access to data and computing resources spanning multiple research domains. They operate IT infrastructures that serve as a model for the EOSC EU node, and they are closely connected to research needs via their membership organisations. Sharing services with, or offloading them to, the established e-infrastructures would reduce operational costs and complexity by, for example, enabling deduplication and standardisation. This would likely benefit research data management and accelerate the development of national data infrastructures.