https://www.engadget.com/2016/11/14/microsoft-visual-studio-for-mac/ Here is what I think about that. Let me start from seemingly unrelated factoids. And thus manipulate you to the conclusion.
End of story for Xamarin possibility to be used by Microsoft. New Cross Platform Architecture is made, implemented and already used in new Office. It is called AirSpace.
I just had to post this link. With or without authors permit. This article is that good.
Balanced and true advice.
This is one of the genuine WIndows 10 setup screens.