"A JavaScript file failing to load will bork most pages. A CSS file failing to load or a key image will cause most people to quit." Wha? Sure, if, say, "app.j

"A JavaScript file failing to load will bork most pages. A CSS file failing to load or a key image will cause most people to quit." Wha? Sure, if, say, "app.js" fails to load, you have a problem. But an analytics script? A 3rd party ad script (which is what the GP gave as an example)? These things can and do fail all the time.