I think there's logistical issues in doing something like that though. Are you just going to fork bitcoin? And the old legacy chain dies off? What happens to Satoshi's bitcoin?
The old chain doesn't die, we simply introduce a new quantum resistant address type. We've introduced many new address types over the course of bitcoin's history, such as segwit and now taproot, with no effect on previous blocks.
So you don't care what happens to peoples' bitcoin who choose not to move to this new address type? I don't think that's a reasonable solution to require people to send their bitcoin to a new address type to avoid losing their funds. That's not the same as segwit or taproot as people had a choice and the default action (none) did not have an adverse affect on them.