With features like this you remove 1/2 of the raison d'etre for the blockchain. Away from applications that really need to solve the byzantine general problem,

With features like this you remove 1/2 of the raison d'etre for the blockchain. Away from applications that really need to solve the byzantine general problem, I see no reason to use the blockchain. In fact, I wonder if there are fintech start ups using language like blockchain in their pitch docs, but in actually plan to use versioning databases like this feature here of CockroachDB or Datomic.