How can anything ever be changed once 51% is abandoned?
I also think there will be a gold rush of hacking old wallets one day when the encryption is broken. Not sure if that will happen before or after btc failure though. You can’t upgrade security on lost wallets.
I think you're confusing proof of work with proof of stake. The integrity of the Bitcoin network is enforced by the miners agreeing on the rules, not by anyone staking their ownership for governance.
I also think there will be a gold rush of hacking old wallets one day when the encryption is broken. Not sure if that will happen before or after btc failure though. You can’t upgrade security on lost wallets.