There&#x27;s an alternate approach that I was mentally contrasting with. You tend to see it with e.g. Ruby apps on Heroku: you can&#x27;t &quot;log into&quot; a live app, but you <i>can</i> launch an IRB REPL—with all the app&#x27;s dependencies loaded—in the context of the live app.<p>Having this ability to &quot;futz around in prod&quot; frequently obviates the need for prescient levels of logging. You can poke at the problem until it crashes <i>for you</i>.