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XHTML 2.0 died on the vine. Its theoretical purity was roundly rejected by the people who actually made websites for a living. Web designers rightly refused to publish in a format that would fail completely instead of trying to recover from an error. Strange then, that years later, web designers would happily create entire websites using JavaScript, a language that shares XML’s unforgiving error-handling model. They didn’t call them websites. They called them web apps. That distinction was cold comfort to someone who couldn’t complete their task because a service relied on JavaScript for crucial functionality.