Vitalik Buterin tweeted that Layer 2 (L2) technology is finally becoming affordable, which is the key to achieving the popularity of decentralized finance (DeFi). He argued back in 2020 that low transaction fees are fundamental to the success of the crypto industry, which has only recently become a reality. Robert Sasu, a core engineer at MultiverseX, responded that L2 is currently cheap only in the case of centralization. Vitalik disagrees, noting that Taiko is a decentralized rollup-based scheme, indicating that the cost of decentralized L2 like Taiko has reached an affordable level. Sasu agreed, but added that rollup-based schemes are still in the minority, and it is hoped that more projects will migrate to this architecture.