What lowered L2 fees this week?

TLDR

L2 fees dropped this week mainly because Ethereums Fusaka upgrade introduced PeerDAS, increasing blob data capacity for rollups and cutting data availability costs for posting to L1, which lowers L2 transaction fees Fusaka upgrade.

1. PeerDAS lets nodes sample blob data, enabling up to 8x more blobs and cheaper L2 data posting PeerDAS details.
2. Blob Parameter Only forks raise blob targets on 9 Dec and 7 Jan, expanding capacity and stabilizing fees schedule.
3. Media estimates point to a 4060% L2 fee reduction as capacity rises and DA costs fall fee impact.

Deep Dive

1. PeerDAS Increases Blob Throughput

PeerDAS (EIP?7594) changes data availability from download everything to sample small parts, so validators confirm rollup blobs with much less bandwidth.

1. This unlocks up to 8x blob capacity and keeps node requirements reasonable, a key to sustainable L2 scaling PeerDAS overview.
2. The Ethereum Foundation emphasized that more blobs directly lower L2 costs by making data posting cheaper and faster foundation post.

2. Blob Capacity Schedule (BPO Forks)

Fusaka includes Blob Parameter Only (BPO) changes to ramp capacity in steps, improving predictability and safety.

1. Current blob target is 6. It increases to 10 on 9 Dec, then 14 on 7 Jan (max values rise to 15 and 21 respectively) schedule.
2. Incremental increases let clients and L2s adapt while monitoring network health, avoiding sharp shocks as capacity expands ecosystem view.

3. Lower DA Costs ? Lower L2 Fees

Cheaper data availability (DA) on L1 is the main cost driver for rollup transactions, so reducing DA costs lowers end?user L2 fees.

1. Reports estimate 4060% fee reductions for L2s as PeerDAS and blob capacity kick in, contingent on traffic and rollup integration speed fee impact.
2. The upgrade also tunes the blob base fee (EIP?7918) to stabilize the fee market, improving predictability as capacity rises upgrade summary.
3. Early hours can be noisy (parameters calibrate, demand fluctuates), but over time lower DA costs tend to pass through to users post?upgrade view.

Conclusion

L2 fees fell because Ethereums Fusaka upgrade made rollup data posting cheaper by expanding blob capacity via PeerDAS and scheduled BPO increases. The effect should strengthen over the next weeks as capacity rises and rollups fully adapt, making typical L2 transactions more affordable while preserving decentralization Fusaka overview, schedule above.