Polkadot announced that its issuance model upgrade officially launched on March 14 (Pi Day). The main protocol changes introduce two core initiatives: first, establishing a maximum supply cap of 2.1 billion DOT (approximately 80% has been issued so far); second, reducing DOT's emission rate by approximately 53% starting March 14, with plans for further reductions in the future. The official statement indicates these changes were proposed by the community and approved through OpenGov, aiming to limit long-term issuance, maintain incentive mechanisms, and provide a transparent and predictable issuance schedule.