Divided Opinion: Adam Back Advocates for Gradual Quantum-Resistant Upgrades to Bitcoin

The emergence of quantum computing has sparked intense debate among Bitcoin developers, with some advocating for immediate action and others pushing for a more gradual approach. Blockstream CEO Adam Back emphasized the importance of preparation, suggesting that developers should begin building optional quantum-resistant upgrades now, despite the current limitations of quantum computers. Back's comments were made at Paris Blockchain Week, where he highlighted the potential risks of reacting to a crisis rather than taking proactive measures. He pointed to Blockstream's experiments with quantum-resistant transaction signatures on the Liquid network, as well as the flexibility of the 2021 Taproot upgrade, which can accommodate new signature methods without disrupting the network. This approach contrasts with a recent proposal by Jameson Lopp, which would phase out quantum-vulnerable addresses over a fixed timeline and freeze non-compliant coins. The two positions reflect fundamentally different views on how the Bitcoin community should respond to the quantum threat, with Back arguing that developers can coordinate effectively in the event of an emergency and Lopp advocating for a more structured approach to avoid a chaotic migration.