If QC technology is used to crack bitcoin private keys, it will probably be too late to move away from EDSCA and confidence in bitcoin security will be lost/damaged.
+1. the inertia around this subject, and the blind optimism that it will never have real consequences for bitcoin if we do nothing, is very frustrating to me.
There are real incentives for governments to not use QC technology to steal bitcoin, but once it is publically known such technology exists in the present, it will be too late to change. The biggest risk is IMO a rogue employee who wants to steal bitcoin, or who wants to trade on insider information about making it known that QC technology can crack bitcoin private keys in some circumstances.