#rollup

Although rollup can reduce costs, due to limitations on the number of interactions and Ethereum gas fees, the overall fee structure is still linear, which means there is actually no upper limit, but it will still be lower than Ethereum's fees.

1. For example, if rollup itself is used by many people in a short period of time, such as arb’s previous Odyssey event, it will lead to an increase in its own expenses.

2. Assuming that the gas cost of Ethereum itself remains high, the interaction cost between rollup and Ethereum will still increase to a certain extent no matter what.

Solutions include

1.celestia’s modular DA layer converts the fee structure into sub-linear, that is, there will be a final upper limit that approaches

2. Op’s Bedrock update, introducing EVM equivalence and simplifying the number of codes