[chaosmail]

I think Blockchain technology as distributed immutable ledger is a very nice data structure for a lot of real world use cases (supply chain, market place, contracts,..). Sure it's also a huge hype thanks to crypto currencies, icos, etc. but the technology fulfills a need. However, I see more advantages in using private quorums leveraging proof of authority instead of public networks of untrusted nodes. I understand that not everyone might be ok with this tradeoff.

[icebraining]

Distributed immutable logs of data existed long before the Blockchain (as someone pointed out, Git is a good example - just sign your commits). The innovation of the Blockchain was specifically the combination of that with the POW, which enabled coordination between untrusted nodes without falling prey to Sybil attacks.

A private blockchain is just giving another name to a preexisting model. It's like saying "I use a pedelec, but I see more advantages in removing the motor and battery".