Gattaca shipped an Ethereum consensus client. Gattaca is a London prop trading firm turned block builder. Titan is theirs, one of three builders producing most Ethereum blocks. CEO Kubi Mensah. They run MEV-Boost relays, Titan Relay on mainnet, and adopted Arbitrum Timeboost early. Prop trading to dominant builder. Silver: built from-scratch Rust, open source, alpha, unaudited. Claims 6.5 ms median block processing against 33.5 ms next-best, p99 9.5 ms against 91 ms. An MEV company at the most centralized layer of the supply chain is now building decentralization (probably for MEV profits). It's a real contribution and a bid for influence over the rules it monetizes.