In what fields is the blockchain technology currently being used? I personally haven't seen much of this at all. Most of what you read is either hot air or just a marketing stunt because blockchain has become a buzzword.

Most people don't know what a blockchain actually is, but go with the hype because they expect significant gains, and not so much care about what it does and how 'efficient' it is.

People with understanding of blockchain and no direct bias because of their investment know that it's not better than a database. Brad Garlinghouse even said that it's less efficient than a database, and he knows his shit better than anybody else.