PANews reported on May 10 that Optimism announced that it has successfully activated the Isthmus hard fork, introducing key features from the Ethereum Pectra upgrade to the OP Stack and Superchain. This upgrade was only two days after Pectra went live on the Ethereum mainnet, making Superchain the first L2 ecosystem to support the Pectra upgrade. This upgrade covers Base, Ink, OP Mainnet, Soneium, Unichain, and several other OP Stack chains. Superchain supported nearly 70% of L2 activity in April (calculated in transaction fees), and each OP chain in Superchain will give back revenue to the Optimism Collective in exchange for shared governance, security, and upgrades.