Ethereum Devs Call Out Rollups: “Test on Devnets, Not in Production”

Ethereum core developers, speaking on the All Core Developers Consensus (ACDC) Call #167, emphasized that Layer-2 rollups should treat Devnets as genuine staging environments rather than running live operations on public testnets. The article says many rollups, including Arbitrum, Optimism and zkSync, frequently use public testnets such as Sepolia or Holesky for near-production operations. It notes this bypasses protocol-level validation that dedicated Devnets provide, and participants on the call specifically pointed to Fusaka's Devnet-3 as an ideal late-stage validation environment.