This is why I've always said the move to a new algorithm should be done through a hard fork with a deadline and any coins that don't move before that deadline should be considered unspendable.
On BIP360 Phase C is also proposed which will make people to later be able to recover their coins if they have not moved to quantum resistant addresses after few years deadline has passed. I saw it there as optional but if done, no one will lose as long as they have their private keys. But the problem that I saw there which is confusing is that they referred to BIP39 seed phrase and not private key. But the main problem is that they may have hidden agenda just like BIP 340, 341 and 342 which was about Taproot.
I hope it will also not be hidden agenda like Taproot which was proposed to be a multisig in a way that many keys and signatures will aggregate to make transaction fee to be highly cheaper for multisig, but which we later did not see but saw just BIP86 which is about Taproot single signature, and also Ordinals NFTs and Ordinals BRC20 spamming the bitcoin network.
This still makes me think that why was Taproot even created when we did not see it's main benefit. The optional in Place C makes me doubt.