I just read a great article by Kai Stinchcombe. You can read it here. He makes the case that blockchain technology is not going to be implemented and that it has no future. Since the cheerleaders of bitcoin love to talk about things they know nothing about, namely economics, currencies, and finance, I figured I would give my two cents on blockchain technology outside of bitcoin. I happen to think Kai Stinchcombe is correct. Blockchain does not have a use. There are many protocols used that are far superior to blockchain. I also see articles that say blockchain will replace TCP/IP. These people have no idea what they are talking about. Blockchain will not replace TCP/IP. Microsoft has declared TCP/IP the winner of the network protocol battle. It re-architected the network protocol portion of the their network stack from being protocol-neutral to being TCP/IP-centric. Furthermore, blockchain and TCP/IP are two separate things.
It has been 10 years and I have not seen anyone implement blockchain except in cryptocurrencies.
Prediction: Another 10 years will go by without blockchain being implemented into anything useful.