Vitalik Buterin replied to netizens on X: "The key thing we are really in the early days is that L2 will finally be able to afford it. Since 2020 (if not earlier), I have been saying that the whole'not just high-value DeFi 'part of the crypto space can only work if transaction fees are cheap. They didn't really become a reality until March of this year. If I had to choose the second and third early areas, it would be: 2. ZK-SNARKs and use cases (zupass, railway, 0xbow, rarimo, etc.) are finally approaching maturity. 3. Account abstraction ZK-email (and zk-wrappers like centralized IDs) is especially important as it connects the two. "