How about syntactic extensions:
(defmacro unless (test &body body)
`(if (not ,test) ,@body)) (defmacro unless (test &body body)
`(if (not ,test) ,@body))There are many more examples of macros that solve real world problems, such as writing a compiler for an embedded DSL that is tuned to solving your real problem that allows expressivity and brevity that you would never see without the use of macros.