As far as i know since i were joining in the crypto and ethereum never faces such problem. If the blockchain got shutdown and that means such blockchain is not decentralized. that means that blockchain was totally centralized. How is it possible for a blockchain that was putting decentralization as the main thing to run its protocol gets shut down? Being decentralized means so many nodes are supporting the protocol and once a node gets shutdown and another nodes can back it to keep the protocol is still running. ONE and SOL are horrible blockchain. The only thing that i heve ever heard about ethereum is it was getting a problem due to the EIP implementation. Durning the implementation ethereum the blockchain became lag.