Deep Dive
1. Farfadet Upgrade (December 2025)
Overview: Activated on December 22, this Etherlink Layer 2 upgrade increased chain capacity to 1,000+ transactions per second while maintaining sub-cent fees.
The upgrade introduced instant confirmations for transactions, crucial for DeFi and gaming use cases. Fast withdrawals—previously taking 15 days—were reduced to under a minute via a decentralized liquidity bridge.
What this means: This is bullish for XTZ because it strengthens Tezos’ position as a scalable EVM-compatible chain, attracting developers needing high-speed, low-cost infrastructure. (Source)
2. Seoul Protocol (September 2025)
Overview: The 19th protocol upgrade added native multisignature support and streamlined staking.
Developers implemented BLS signatures to bundle multiple approvals into a single cryptographic proof, enabling institutional custody solutions. Network validation data requirements dropped from 900 MB/day to 14 MB/day, improving node efficiency.
What this means: This is neutral for XTZ—while boosting enterprise adoption, it doesn’t directly impact retail users. However, reduced operational costs could incentivize more validators. (Source)
3. Tezt 4.3.0 Integration (November 2025)
Overview: Updated testing tools now track memory usage and resolve rare scheduler crashes.
The merge request (GitLab) emphasized compatibility with CI pipelines, ensuring developers can reliably measure performance during smart contract audits.
What this means: This is bullish for XTZ because robust testing frameworks reduce bug risks, critical for high-stakes applications like uranium tokenization and DeFi.
Conclusion
Tezos’ late-2025 upgrades prioritized scalability (Farfadet), institutional readiness (Seoul), and developer experience (Tezt). With Layer 2 TVL surging 5,566% in 2025, how might these technical strides position XTZ in the 2026 modular blockchain race?