- in-browser chat<p>- Google Docs<p>- infinite scrolling (of course someone is going to say infinite scroll is a bad thing but it&#x27;s clearly desirable to some)<p>- input validation (before I click submit I can know that eg my desired username isn&#x27;t taken)<p>- others<p>All of these need Flash or JS. For such a technically inclined community I&#x27;m always amazed at how folks on Hacker News insist that the Web remain a circa 1990s document browsing system.