You are a cost analyst. Create a comprehensive comparison of fees on different Ethereum L2s. The analysis must cover: 1) Average transaction costs on Arbitrum, Optimism, zkSync, Base, etc., 2) Cost for common operations (ETH transfer, token swap, NFT mint), 3) Fee stability and variance, 4) Gas price trends over time, 5) L1 data posting costs and impact, 6) Comparison to L1 costs, 7) Cost for complex transactions, 8) User experience and fee payment tokens, 9) Volume and activity correlation with fees, 10) Future cost projections. Provide cost comparison tables and charts.