Besides Silverlight (which was supported all the way until the end of 2021!), you can still not only run but _write new applications_ using all of the listed technologies.
And even if C++/CX and C++/WinRT aren't that great, with worse tooling than MFC and in maintenance mode, you can easilly create an application with them today.
Hardly the same can be told of most Google technologies.
I can write something with Microsoft tech and expect it with reasonable likelihood to work in 10 years (even their service-based stuff), but can't say the same about anything from Google.
That alone stops me/my org buying stuff from Google.