Divide in Bitcoin's Quantum Computing Discussion as Adam Back Advocates for Gradual Upgrades

The threat posed by quantum computing has led to a significant divergence in opinion among Bitcoin's prominent developers. Adam Back, CEO of Blockstream, stated at the Paris Blockchain Week that Bitcoin should start building optional upgrades to counter quantum computing threats, despite the current incremental progress in the field. Back emphasized that preparation is crucial and that making controlled changes is safer than reacting to a crisis. He highlighted Blockstream's experiments with quantum-resistant transaction signatures on the Liquid network and argued that the 2021 Taproot upgrade provides the flexibility to incorporate new signature methods without disrupting the network. This stance is in contrast to a recent proposal by Jameson Lopp, which suggests phasing out quantum-vulnerable addresses over a fixed timeline and freezing non-compliant coins. Back's approach implies an alternative to Lopp's proposal, suggesting that Bitcoin's community can respond effectively to a sudden quantum breakthrough without the need for pre-scheduled freezes.