Regarding Microsoft - that's a sad story indeed. The only reason they don't use Win32/GDI+ etc is because it's harder and you ideally want to do that in C++ to get the true powers available to you.

I've recently had to do some win32 stuff in a Flutter app and it's amazing what you can do, but it's pretty hard, even with an AI to help you.

So the "lazy" devs go to work using React Native and Electron rather for apps inside of Windows shipped by Microsoft. Crazy, but it's to meet deadlines.