Cardano's Van Rossem Hard Fork Hits Preview Network as SPO Upgrade Race to 80% Threshold Begins!

The van Rossem hard fork governance action has been submitted to Cardano's Preview test network, marking a concrete step toward mainnet activation. Alongside the submission, Cardano Node version 11.0.1 Pre-Release is now available — described by Intersect as an essential requirement for safely crossing the hard fork boundary.

The critical metric to watch is SPO adoption: mainnet activation is gated on 80% of stake pool operators upgrading to the new node version. That threshold makes the upgrade pace of the decentralised operator set the single biggest variable in the timeline.

DApps and other ecosystem participants are also flagged as needing to act ahead of the fork. With the governance action live on Preview, the community now has a live environment to validate readiness before the mainnet vote proceeds.