Explore the current state and future prospects of Ethernet technology in datacenter and supercomputer environments through this insightful 25-minute conference talk presented at Hot Interconnects 2023. Gain valuable insights into the "Ethernet or Ethernot" panel discussion, delivered by experts from the Scalable Parallel Computing Lab (SPCL) at ETH Zurich. Delve into the critical role of Ethernet in modern computing infrastructures and examine its potential to shape the future of high-performance networking in large-scale computing systems.