Ethereum Foundation's Marissa Posner and Yoav Weiss discuss the Ethereum Interop Layer (EIL) in a recent podcast, highlighting its potential to improve user experience without compromising Ethereum's trustless principles. The EIL seeks to enable seamless cross-chain interactions with a single signature, reducing reliance on intermediaries and enhancing security. The discussion also covers the Trustless Manifesto, which aims to prevent trust assumptions from undermining Ethereum's core values, and the importance of wallets in the security model. The EIL is expected to be a significant step towards mainstream adoption, with a mainnet target set for 2026.