Here is a compact reimplementation of Doom's quiet! macro. It depends on package llama, but I challenge anyone to rewrite it with lambdas and then tell me that it was worth it.
;; -*- lexical-binding: t; -*-
(defmacro quiet! (&rest forms)
"Eval FORMS like `progn', but muffle all messages."
`(if init-file-debug
(progn ,@forms)
(let ((inhibit-message t)
(save-silently t)