Doesn't matter; there are no technical details for this, and so far nobody has a solution on how to do this. Yes, permissionless networks exist; but no network has transitioned from a permissioned to a permissionless network. While transitioning from a permissioned to a permissionless network, you open your gates to a horde that are financially incentivized to exploit this newfound permission. How then are you going to secure yourself from an attack? Nobody has this figured out. It's mathematically unsound.