I think that you're in a bubble for that one. Many business domain-specific applications are still directly written against Win32 even today. UWP didn't manage to catch up for now either.
Electron usage is mostly only in startup-y apps and some IDEs.
Outside games, most modern Windows applications, specially in the areas you mention, I have also seen WPF/Qt, with plain old Win32 just as glue for underlying OS APIs.
There are still some odd ones that keep doing MFC, or enjoy a mix of Delphi/C++ Builder.
The only old style C Win32 applications I have seen in the wild during the last decade tend to be surviving applications from the 90's, done by companies not so much into Windows C++ frameworks.
I still mourn the days of shareware.