When Vitalik Buterin published “An Incomplete Guide to Rollups” on January 5, 2021, the total TVL (total value locked) in Ethereum Layer 2 (L2) solutions was relatively low at about 75,000 ETH ($78M). At the time, the L2 market seemed to have a long way to go. However, there are about 26 L2 projects now, and the current L2 total TVL is about 3.2M ETH ($5B), a 42-fold growth in ETH and 64-fold growth in terms of dollars. In particular, Arbitrum and Optimism, two major optimistic roll-up projec...