AFAIK Annex K originated as a Microsoft proposal, so I find it somewhat strange that you're using it as an example of a C feature that Microsoft shouldn't adopt (though I agree that it's a terrible feature that never should have made the cut).

Yes, as such there is nothing to adopt. It is already there.

What I am in favor is Microsoft pushing C aside.

C++ provides safer constructs and if one wants to keep on doing unsafe C style coding, it is still there.