The Ethereum Privacy Stack 2025 event, held during Devconnect Buenos Aires, underscored a significant shift in the Ethereum privacy landscape. Organized by Privacy & Scaling Explorations, Web3Privacy Now, and the Ethereum Foundation, the event featured prominent figures such as Vitalik Buterin and Tor founder Roger Dingledine. The discussions centered on achieving 'Holistic Privacy,' which encompasses not only on-chain tools but also network transmission, RPC layers, data storage, and user interfaces. Vitalik Buterin and Roger Dingledine highlighted the critical issue of IP leaks at the network layer, which can undermine application-layer anonymity. The event also set ambitious goals for 'default privacy,' aiming to make private transactions cost-effective and improve user experience by 2026, thereby appealing to both retail and institutional users.