> for example git could be described as a application of blockchain technology Git isn't a blockchain as it lacks a consensus mechanism. It can however be used

> for example git could be described as a application of blockchain technology Git isn't a blockchain as it lacks a consensus mechanism. It can however be used as an append only immutable distributed ledger. If that's all you need, you don't need a blockchain. That's precisely why consortium and private blockchains do not make any sense. Either they have a consensus mechanism that's useless and wasteful, or they're just not blockchains. We can't call everything a blockchain otherwise it's not possible to talk about the technology in a meaningful manner. Blockchains were invented in 2008 in the Bitcoin paper. Merkle trees dates back from the 80s. It makes no sense to call a Merkle tree that happen to have the constraint of having a single child per node a "blockchain" except to ride the hype train. Merkle trees have a lot of legitimate use cases. Blockchains only and single use case that make sense is making so-called "cryptocurrencies", which in turn has a single use case which is speculation, which is not something either useful to society or desirable for most people.