Webmail is way too ubiquitous for desktop email software to be worth the million dollars a year it costs to hire five bay-area software developers to build and maintain it. I imagine Dropbox would have kept it around if it saw more user traction, but it didn&#x27;t.<p>Inbox by GMail has some of the ideas from the Sparrow team incorporated in it, but it&#x27;s only really usable on mobile. (The desktop Inbox web app is awfully slow compared to, say, GMail or Outlook.com.)<p>When Hotmail came out, who still paid for Eudora licenses?<p>That said, if a decent email client is that important to you, don&#x27;t underestimate the impact you could have building it yourself as open source on evenings and weekends. And if you don&#x27;t think it&#x27;s worth your time to do that much, why would you expect anyone else to?