Ethereum layer-2 on-chain activity has been increasing to the extent that the leading two networks now process more transaction volume than mainnet Ethereum. Layer-2 networks Arbitrum and Optimism have seen an increase in transactions over the past three months. Comparatively, aside from a few spikes, transactions on the Ethereum network have declined by around 33% since late October, according to Etherscan. This has enabled the two L2s combined to flip Ethereum for this metric, according to Dune Analytics data. The chart shows Ethereum processed over 1.06 million transactions on Jan. 10, whereas Arbitrum and Optimism combined processed over 1.12 million transactions. Additionally, Optimism has now surpassed Arbitrum in terms of daily transactions following a steady uptrend in activity sin...