Alpenglow, described as Solana’s most significant consensus upgrade, is scheduled for October 21 on the mainnet with a target of reducing transaction finality time to 150 milliseconds. This upgrade will replace the TowerBFT voting layer with direct validator votes and aggregate certificates. The SOL token was trading around $107 on October 13, down approximately 4% on the day. Official documentation has yet to confirm the October 21 activation date, but market participants are closely monitoring the unfolding developments.
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