Alpenglow replaces Tower BFT and Proof of History with Votor and Rotor, slashing Solana’s transaction finality to 100-150ms for unprecedented speed. Anza’s Alpenglow proposal introduces Solana’s most significant protocol upgrade, replacing legacy systems with Votor and Rotor to slash transaction finality to 100-150ms, promising to enhance speed, security, and scalability in 2025. 1/ Introducing the largest Solana Protocol change ever: Alpenglow, Solana’s new consensus protocol conceived by the Anza Research team.