Anza has scheduled Solana’s Alpenglow upgrade for October 21, aiming to reduce network finality from approximately 12.8 seconds under TowerBFT to just 150 milliseconds. This major protocol switch represents a significant performance enhancement designed to drastically improve transaction confirmation speeds across the blockchain. Validators must update to Agave 4.3.0-based clients prior to the activation date to ensure compatibility with the new consensus mechanism. The upgrade marks a critical infrastructure milestone as Solana continues to optimize its network architecture for faster settlement times.