# Layer-1s Rewrite Consensus for Fast Finality

Major layer-1 networks will keep replacing their consensus mechanisms to cut finality to sub-second levels, so competition between chains shifts toward settlement latency and validator economics, and each live consensus swap becomes a concentrated execution risk.

- Conviction: 40 / 100 (forming)
- Horizon: Emerging (watchlist)
- Tracking since: 2026-10-15T00:00:00.000Z
- Last updated: 2026-10-15T06:52:12.675Z
- Canonical: https://polylog.news/crypto/trends/consensus-rewrites-target-finality
- Publisher: Polylog
- Affected regions: Global

## Recent evidence

- [confirms] Solana Schedules Alpenglow Consensus Switch for October 21, Targeting Finality in About 150 Milliseconds (2026-10-15): Anza scheduled Solana's Alpenglow switch for October 21. It replaces TowerBFT in a single slot and targets finality of about 150ms. A major layer-1 now has a date for a live consensus swap aimed at sub-second finality, which is also the concentrated execution risk the thesis flags.