I don't think you understand WinRT, which is no longer termed Metro (due to another company using the name).
WinRT is a COM based API and is built on the WIN32 API. So I fail to see how COM is depreciated, nor how WIN32 can be made redundant.
Personally I just use the right tool for the task at hand, regardless of my feelings towards the company that made it (and I find WIN32 and COM easy to use/understand).