Any good uses for PHP's built-in server?

So there is a built-in web server in PHP as you likely know. But I am wondering if there are any good use cases for it. Since most people these days seem to recommend using Vagrant I guess I am wondering what the point of the built-in server is. Would it be easier if you are reading a PHP book to do the book exercises on the PHP server? Does it have any advantages over Vagrant? Thanks for any tips.