Desktop UI APIs had/has the benefit of some OOP inheritance and a good set of standard components, plus separating layouts from styling. The web has only recent

Desktop UI APIs had/has the benefit of some OOP inheritance and a good set of standard components, plus separating layouts from styling. The web has only recently caught up with 2nd, and solved the 3rd in its own way - but it really is funny how insane amount of work is needed to have a custom date picker on the web vs on even something like WinForms.