I mean like you take the old thing and enhance it a bit but dont make a new thing from scratch because the idea and architecture has always been perfect. Most GUI toolkits from microsoft are drilled for ease of use so you dont have to have many devs to get something running (looking at dual way data binding and xaml). Imho thats the wrong approach, make it perfect for experts and approachable for juniors, winforms was very easy to click together, WPF not so much, too much framework magic.