Goerli is shutting down

Goerli, Ethereum's first multi-client testnet, is being shut down, and users and developers are told to migrate to Sepolia or Holesky as soon as possible. Client and EF testing teams will stop supporting Goerli in the coming months, and the Dencun upgrade will be its last network upgrade. Teams will begin exiting their validators either three months after Goerli's Dencun activation or one month after Dencun's mainnet activation, whichever is later. The article notes that Sepolia offers a stable, permissioned validator set for application testing, while Holesky is recommended for protocol-level testing and Ephemery for validator setup testing.