Yo,
So apparently there's like 4-6 million bitcoin that are lost and gone? Just curious if there was any ideas or plans to update the protocol to replace the lost bitcoins if there was a consensus, if that is even possible.
It is not possible to replace lost Bitcoin. Any Bitcoin that is lost is lost for good and gone forever there is no point thinking about a way out. We just need to be careful the way we keep our pass phrase because our pass phrase is our identity and pride. If you misplaced the pass phrase your coin become trapped in the wallet and becomes useless.