The Bitcoin-Quantum computing attack has been a discussion for sometime now, and I never expected a sudden proposal at this early stage because we haven't really see the effect of quantum computing attacks, as a primary target to any form of technology. I know that some of these big companies are investing heavily on it, and their progress so far isn't fully disclosed to the public. But it is good that a proposal was introduced at this early stage, so that proper remodification and adjustment can be done before fully implementing, if still necessary.
I also want to learn about quantum computing, i need free time as well because it looks complex and relating it to BIP360.
I have seen a topic discussion relatively to this exact topic, if i can recollect from the old post, quantum computing is still in development stage, right?
But I doubt if such people will leave those Satoshi P2PK transactions holding multi billion dollars of coins today. But in short, it is good if bitcoin is moved away from ECDSA/Schnorr signatures.
It all depends on their approach of attack.
They might decide to go for dormant wallets aside that of Satoshi, just to test. Because a direct attempt on Satoshi's old wallets might escalate things, and who knows what will happen afterwards.
As soon as they fully develop quantum computing, they will not be interested in wallets holding small quantities, targets will be those holding large amounts (Bitcoin whales), and Satoshi wallet might be next on the line to be compromised since he holds the biggest amount of Bitcoin.