I'm not sure one is locked down. One can write the model and the controller in the style one likes and then they just bind to appkit/uikit for the Apple version

I'm not sure one is locked down. One can write the model and the controller in the style one likes and then they just bind to appkit/uikit for the Apple versions. This could be done despite nobody I know working this way. This used to be normal when x-windows was thriving.