The recent abnormal transactions and block roll-backs events on BSV again aggravated my worry towards PoW consensus mechanism in general. Many aspects of PoW have been proven to be long-term unsustainable and potentially catastrophic in commercial application scenarios. Enormous energy waste (In China, mining has been recognized as an obsolete practice), block infinality and security vulnerability to 51% attack, these are all issues that the blockchain consensus algorithm must face and solve. NEO has been perfecting our dBFT consensus mechanism relentlessly. In early May, NEO will be integrating the much optimized dBFT2.0 as a Part of NEO 3.0 effort on Mainnet to ensure instant block finality, along with other stability& performance enhancement features.