One panel session at this year's virtual Design and Verification Conference and Exhibition tackled the challenges in EPI: Verification Challenges of an Exascale Supercomputer.
From the event website:
"Europe and the European Processor Initiative (EPI) consortium are taking a huge leap forward with the goal to design a low-power, high-performance exascale supercomputer. Many notable European companies are committed to revolutionary new microprocessor architecture and roadmap for a well-implemented design."
Panel recording is available through our repository: https://www.european-processor-initiative.eu/dissemination-material/epi-dvcon-europe-2020/