So... they are trying to make the Web more shareable with a proprietary annotation feature, thereby introducing a new category of UX issues, bugs and incompatibilities.

I suppose that would be kind of neat if the Web wasn't already the most shareable medium in the world (you've heard of URLs?).

MS is way behind in standards implementation (yes still, even in IE11). Yes this software is pure vapor, but has their browser project office heard of feature prioritization?

MS has not, cannot and will never change. They are onto a losing strategy long-term (just review your GA logs). And for that I am glad because as a developer for the Web, I hate them with a passion.