Pi Network issued a mandatory Protocol 22 upgrade deadline of April 27 for all Mainnet nodes, with non-compliant nodes to be automatically disconnected.The upgrade is described as a critical infrastructure step preparing the network for full smart contract functionality, expected under Protocol 23 in May 2026.PI traded at approximately $0.1687 on April 23 with an $1.73 billion market cap, largely unmoved by the technical development activity despite the network surpassing 18 million KYC-verified users.