Ask HN: WHy no talk of Qooxdoo?

I have been researching the various JavaScript frameworks to build desktop like web apps and i noticed that sproutcore and cappuccino are getting all the attention, yet qooxdoo looks amazing, even their level of support, community activity and documentation, am i missing something here? If i go with all the hype, then i would be learning sproutcore or cappuccino, maybe its just the these two latter frameworks have a more promising future? Any thoughts, thanks!