If you are gonna downvote, say something.
I can’t tell if you’re downvoting because you saw the word “blockchain”, or you really love it.
I’m using quotes in the title, because I suspect a major amount of people use the word “blockchain” loosely to refer to other related things. If you are willing to, please provide a definition of what you mean by “blockchain” as well.
I don’t hate arrays and hashtables, but if a bunch of fools started hyping them as a get rich quick scheme I would reflexively start downvoting the word.