Similar plan, in 2019 I went back going to distributed systems/Web, where Microsoft technologies are one among many others that get used on a polyglot agency, the usual "A jack of all trades is a master of none, but often times better than a master of one.".

For doing Windows stuff, I would rather advocate for Win32, Forms/WPF.

In regards to C++ stuff, either C++ Builder if it fits the budget, or Qt.

It is quite tragic that even MFC has a better development story than WinUI/C++.