Bug on Ethereum's Nethermind Software Sparks Discussion of 'Client Diversity' Risks
Briefly

It was a manageable incident, but the episode revived a long-simmering debate in the Ethereum ecosystem around the need for 'client diversity.'
Depending on the nature of the bug, a Geth glitch could halt the entire network, rendering it impossible for validators to add new blocks to the blockchain. Ethereum is also programmed to penalize validators that fall offline or break the network's rules, meaning thousands of Geth-based validators could be held financially liable in the event of a bug.
Users who are staked in protocols that run Geth would lose their ETH in the event of a critical issue.
Read at Coindesk
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