The upgrade introduces the eXpress Data Path (XDK) for faster data propagation and BLS key support for validator authentication. Validators tolerate up to 40% offline stake without consensus interruption.
Sub-150ms finality reduces MEV extraction windows, making DEX slippage more predictable. Margin trading and liquidation bots gain advantage, while casual traders face tighter execution risk windows.
Mainnet activation requires validator opt-in via Validator Admission Ticket (VAT). Testnet milestones must succeed first. If on schedule, mainnet goes live late September or October 2026.
Monitor SOL price action as Alpenglow approaches — upgrades often see pre-event rallies. Watch validator adoption rates (needs substantial stake) and whether 100ms finality attracts institutional trading.
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