Which L2s saw blob fee relief?

TLDR

Fee relief from higher blob capacity is showing on the busiest Ethereum L2s, notably Arbitrum, Optimism, Base, Mantle, zkSync Era, Starknet, and Scroll, as Ethereum raised blob limits and targets this week (network update).

1. The fork lifted the blob limit to 21%%CKPROTECTED2%% and the target to 14%%CKPROTECTED4%%, expanding rollup data throughput and lowering data costs (network update).
2. These rollups rely on blob space for batching, so capacity increases help stabilize fees for Arbitrum, Optimism, Base, Mantle, zkSync Era, Starknet, and Scroll (rollup list and impact).
3. Relief varies by demand; if blob usage spikes, fee gains can be muted, but stability improves when usage stays below targets (analysis).

Deep Dive

1. L2s Benefiting

The busiest Ethereum L2s that post frequent batches to mainnet benefit most from blob fee relief.

1. Rollups specifically cited include Arbitrum, Optimism, Base, Mantle, zkSync Era, Starknet, and Scroll, all of which depend on Ethereums blob space to settle batches (overview).
2. Coverage confirms the same set as primary blob-space consumers, tying capacity expansion directly to their end-user fees (context).

2. Why Fees Eased

Ethereums Blob Parameter Only fork raised per?block data capacity, which directly pressures blob fees lower.

1. The change increased the blob limit from 15%%CKPROTECTED2%% to 21%%CKPROTECTED4%% and the target from 10%%CKPROTECTED6%% to 14%%CKPROTECTED8%%, raising per?block data throughput for L2 batches (network update).
2. More blob supply reduces data costs for rollups, keeping L2 transaction fees low as activity grows and improving fee stability (coverage).
3. Post?fork, fee volatility has already shown signs of improvement, aligning with the goal of smoother rollup fee dynamics (stability note).

3. Relief Is Uneven

Fee relief depends on actual demand for blob space and network conditions.

1. Analysts note relief is conditional; if blob demand ramps as fast as capacity, the price benefit narrows and operators must validate stability as targets rise (analysis).
2. Current usage remains below the new target, suggesting headroom and a bias toward lower fees unless activity surges (usage context).
3. The incremental approach aims to tune capacity ahead of congestion, keeping fees in check without large overhauls (strategy).

Conclusion

Ethereum increased blob capacity, which translates into immediate fee stability and relief for major rollups that rely on blob space. The net effect is strongest on Arbitrum, Optimism, Base, Mantle, zkSync Era, Starknet, and Scroll, with the caveat that relief varies by demand and batch timing. Watching blob usage and rollup fee dashboards helps confirm the magnitude of benefit in real time.