I'm an Electrical Engineer, and I get paid to solve problems quickly and efficiently, not to waste time running down rabbit holes with different tools to solve those problems. Windows Forms allows me to quickly drag n drop controls (including Charts, which are very important in science and engineering) and use them immediately. Why should I waste time learning and using WPF and XAML to get the same or similar results? And my recollection is that WPF doesn't include Charts, so why should I waste more time finding and figuring out some replacement, and hope it will survive and be supported in the future? If you're a hobbyist with a lot of time on his hands who is convinced "newer is better", then yeah, go ahead.

@@EETechStuff the answer is simple: Technological process. 😉