> with an (empirically battletested) consensus mechanism.
In fact there almost as many consensus mechanisms as there are blockchains. In the beginning it was PoW that defined what was a blockchain, but with its obsolescence in favor of Proof of stakes for many chains the situation got muddier. Facebook's Libra/Diem for instance was based on a strongly consistent algorithm (as opposed to the eventually consistent nature of PoS) that's not that different from PBFT and ByzPaxos.
In fact there almost as many consensus mechanisms as there are blockchains. In the beginning it was PoW that defined what was a blockchain, but with its obsolescence in favor of Proof of stakes for many chains the situation got muddier. Facebook's Libra/Diem for instance was based on a strongly consistent algorithm (as opposed to the eventually consistent nature of PoS) that's not that different from PBFT and ByzPaxos.