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.