In the same sense that moving to PoS is 'not a big issue'. The Bitcoin protocol, using PoW and quantum-vulnerable keys, is defined in the Whitepaper and can't m

In the same sense that moving to PoS is 'not a big issue'. The Bitcoin protocol, using PoW and quantum-vulnerable keys, is defined in the Whitepaper and can't move anywhere. People in the Bitcoin community can move to a new protocol and try to create an air of continuity (which will likely happen, multiple times, creating questions about who the 'real' successor is).