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Sprinter co‑founder warns Ethereum upgrades are hard to test and may disrupt apps
Greg Markou, co‑founder and CEO of Sprinter, said that Ethereum upgrades are difficult to test and can cause unexpected disruptions despite successful testnet trials. He cited his experience maintaining web3.js during the London hard fork in August 2021, when an invariant involving MetaMask broke many applications. Markou explained that testnets cannot cover every edge case that may affect live apps on the mainnet. He emphasized that the network’s size and interconnections make predicting ripple effects challenging. No new upgrades were announced as a result of the discussion.