Came here to say basically this, but want to add one thing: they also don&#x27;t talk about reputation and management of that reputation.  In order words, you wouldn&#x27;t take an Uber ride with someone that has 1&#x2F;5 star rating.  How would the blockchain deliver this info to the user in a concise, readable way?<p>Seems like the author does not realize that higher abstractions don&#x27;t always make a solution better.