Ethereum’s Shanghai upgrade, which will enable the withdrawal of staked ETH, successfully rounded the final corner in the build-up to its much-anticipated April launch, the network’s core developers have confirmed. The Goerli testnet, essentially a comprehensive dress rehearsal of Shanghai, launched late Tuesday, and finalized roughly 90 minutes later. According to multiple Ethereum core developers, a brief delay was caused by some validators running older versions of clients. Those validators were swiftly brought on board, though, allowing the testnet to successfully resolve.