On related note, it surprises me that client-side frameworks like cappuccino.org are not used more often for building full-featured web apps. It seems to me tha

On related note, it surprises me that client-side frameworks like cappuccino.org are not used more often for building full-featured web apps. It seems to me that the abstraction from HTML and CSS is quite a desirable thing, I find the experience of modern desktop frameworks like Cocoa thousand times better than fiddling with HTML. Does anybody here have substantial Cappuccino experience? Why isn't it more successful?