The Ethereum Foundation takes the view that "client diversity" of proof-of-stake validator implementations is a security requirement: https://ethereum.org/en/de

The Ethereum Foundation takes the view that "client diversity" of proof-of-stake validator implementations is a security requirement: https://ethereum.org/en/developers/docs/nodes-and-clients/client-diversity/ https://ethereum.org/en/developers/docs/nodes-and-clients/cl... Shipping an endorsed EF implementation would undermine that requirement. So instead, they publish and regularly update a spec, the major clients are all open source, to some extent the EF has sponsored the development of multiple clients, there is continuous interop testing between all the major clients going on, and the client teams meet at weekly EF meetings. Ideally they would like to see client diversity in the execution layer as well (Geth et al), and consider single-client (Geth) dominance to be a weak part of the system.