All of these proof of X are just mechanism to find the next “leader” who will be in charge of proposing the next page of the ledger. Proof of work has proven to

All of these proof of X are just mechanism to find the next “leader” who will be in charge of proposing the next page of the ledger. Proof of work has proven to be wasteful, I personally don’t really see a great usecase in proof of space, proof of stake is basically the way to go. That being said, you have leaderless consensus protocols (avalanche) and even consensusless protocols (AT2).