Solana's Alpenglow Upgrade Explained: What 150-Millisecond Finality Actually Means
Solana replaced its original consensus engine, TowerBFT, with a new system called Votor on October 21, 2026, targeting 150-millisecond transaction finality. Here's how Votor actually works, what finality means in practice, and why early mainnet data didn't yet match the headline number.