Client Diversity of Ethereum

Client diversity is presented as critical to Ethereum's resilience, since a single client used by 66% of validators could finalize a buggy fork, leaving validators who exit it open to a full 32 ETH slashing penalty. Clients above 33% share could prevent finality, so the stated goal is under 33% for each client, with danger beginning above 66%. Multinode validator clients such as Vero and Vouch are recommended because they require M-of-N connected clients to agree before voting, reducing correlated failures from client bugs. Supermajority.info reports 59.4% self-reported network coverage, with the remainder assumed to be mostly Geth.