It depends. If miners handle this in a manner true to the ethos, it’s a nothing burger, just things working as intended. If they opt to burn legacy coins, then

It depends. If miners handle this in a manner true to the ethos, it’s a nothing burger, just things working as intended. If they opt to burn legacy coins, then the chain will split and we will see what fork is deemed more valuable, and a bunch of new value will be sucked out of fiat in the process.