User blog comment:DaNASCAT/Update Your CSS and JavaScript To Speed Up Your Wiki/@comment-166269-20120822233320

Ugh, it uses Javascript? That's fine for importing other Javascript, but for CSS, it's really not much better than the importStylesheet/importStylesheetURI functions that we've had since I-don't-remember-when; if Javascript fails to load for some reason (something causes it to break (which causes execution to halt where it broke), or a visitor has JS disabled, etc.), the stylesheets included via this method don't get downloaded and applied, which means unstyled content.