Cardano's Leios upgrade has entered the engineering phase, focusing on enhancing the Ouroboros consensus mechanism to achieve up to 10,000 transactions per second (TPS). This upgrade aims to improve network speed and scalability while maintaining security. Leios introduces parallel processing by separating input block creation from validation, which reduces bottlenecks and finality times. The development team has completed the core design phases and is now benchmarking performance gains, positioning Cardano to better support decentralized finance and real-world applications.