I don't know any of that terminology or category theory in general, but I'd like to assure anyone who cares that you really don't have to to get the elegance an

I don't know any of that terminology or category theory in general, but I'd like to assure anyone who cares that you really don't have to to get the elegance and power of WPF. It was a steep learning curve sure, but totally worth it. As far as visual control, elegance, and development-pleasure, I think it far surpasses WinForms, the Android UI toolkit, Cocoa, and the web stack. (Though XAML is annoyingly verbose.) The only reason I stay away is because of the performance issues, and the opaque ways in which performance degrades.