I wish this were more widely known, and not just for Wikipedia. There are too many local MediaWiki installations that stick with the dated default Vector theme. NB: it's not the theme's datedness that makes it bad; it's that the design decisions are poor ones that reflect trendy anti-patterns of that era, and in the meantime, the insistence on them has more or less quietly and thankfully disappeared. I'm referring to the attitude that publishing on the Web calls for a sui generis "look" involving sidebars, dubious color and font size choices, and bold emphasis on app-like UI elements and other cruft like navigation controls, rather than foremost emphasizing the content itself and letting the user agent handle things like preferred font size. The Vector skin, like popular Wordpress themes of that time, strongly reflects that style, and it's bad. The Web would be much better off if future MediaWiki installations by default shipped with a skin resembling Wikiwand (modulo the fixes that should be made to it as well—e.g. stop fucking overriding the browser's native font size with your tiny-ass text! HN is just as guilty on this; any site that makes the main body text <1em (or >1em, for that matter) is by definition doing it wrong).