TLDR
Ethereum (ETH) activated the Fusaka upgrade today, adding PeerDAS and a 60M gas limit to scale data and lower Layer?2 costs, with early fee improvements reported after activation per an upgrade confirmation.
- PeerDAS enables up to 8x blob throughput for rollups, reducing node data load per an Ethereum update thread.
- The L1 gas limit rose to 60M, and blob parameters can be raised via BPO mini?forks per a Blockworks explainer.
- Initial reports show L2 fees down roughly 4060% on Arbitrum and Optimism after activation per a market recap.
Deep Dive
1. PeerDAS Scaling
PeerDAS (Peer Data Availability Sampling) lets nodes verify small samples of L2 data blobs instead of downloading full blobs, cutting bandwidth and enabling materially higher rollup throughput per an activation note.
Vitalik Buterin described PeerDAS as significant because it literally is sharding, moving long?planned ideas into live operation while outlining remaining challenges for full L1 scaling per the analysis above.
Expect cheaper, more predictable L2 data costs over time and more headroom for rollup activity as clients and L2s adopt the new path.
2. Gas Limit and BPO Forks
Fusaka increased the L1 gas limit to 60M, lifting base?layer capacity and accommodating higher?complexity transactions per an Ethereum thread summary. It also introduces Blob?Parameter?Only (BPO) forks to raise blob targets without a full hard fork, giving maintainers a lighter lever to expand data capacity per the Blockworks overview.
Planned BPO steps raise blob targets in December and early January, further improving L2 data throughput and fee stability per the thread above.
Capacity expansions wont require full network hard forks. Watch the BPO schedule for incremental fee and throughput improvements on L2s.
3. Early Effects and Stability
Post?upgrade, reports indicate L2 fees fell about 4060% on Arbitrum and Optimism, consistent with improved blob throughput and reduced validator data load per a market recap. Network performance remained stable after activation, with validators and client teams coordinating smoothly per a post?fork status update.
Short?term, fees can fluctuate while clients and L2s tune parameters; the broader fee?burn and deflationary effects depend on activity levels and blob pricing per the Blockworks explainer.
Expect variability at first, then a trend toward lower L2 costs and steadier capacity as client updates and BPO steps roll through.
Conclusion
Fusaka is a practical scaling step: PeerDAS reduces node data load and unlocks higher L2 throughput, while the 60M gas limit and BPO forks raise capacity without full hard forks. If fee reductions persist and activity rises, ETHs long?term value accrual via broader utility and burn could strengthen. Monitor L2 fee benchmarks, blob?throughput metrics, and the upcoming BPO increments to validate sustained improvements.
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