Which L2s shipped upgrades this week?

TLDR

This week, Starknet and Celo shipped live network upgrades, with Polygon reporting a performance hard fork.

1. Starknet (STRK): mainnet v0.14.1 rolling out with brief downtime for efficiency gains upgrade notice.
2. Celo (CELO): Jello hard fork activated to a ZK fault?proof rollup model using OP Succinct Lite coverage.
3. Polygon (MATIC): Madhugiri hard fork cited to lift throughput about 40% to ~1,400 TPS update.

Deep Dive

1. Starknet v0.14.1

Starknet scheduled mainnet v0.14.1 with a short maintenance pause for transactions, targeting faster block closure and the BLAKE hash (SNIP?34) to improve efficiency. The rollout was announced with specific timing guidance and expected brief downtime for users upgrade notice.

2. Celo Jello Hard Fork

Celo reported that its Jello hard fork is live, shifting to a ZK fault?proof rollup design via OP Succinct Lite, positioning it squarely in the Ethereum L2 set while keeping a mobile?first payments emphasis coverage. The same report highlights growing payments usage and a privacy?centric roadmap.

3. Polygon Madhugiri Hard Fork

A Polygon team update cited the Madhugiri hard fork, claiming a ~40% throughput boost to about 1,400 TPS, with more headroom targeted in subsequent phases update. While Polygon spans multiple chains and approaches, performance upgrades on its stack are relevant to L2?style scaling outcomes.

Note: Separately, Ethereum shipped the Fusaka hard fork at L1 this week, expanding blob capacity and PeerDAS to cut L2 data costs and improve rollup throughput, which can translate to lower fees on many L2s market update.

Conclusion

Starknet and Celo delivered concrete L2 upgrades this week, and Polygon reported a performance hard fork on its stack. Together with Ethereums Fusaka at L1, the backdrop favors lower L2 costs and higher throughput near term.