MicrosoftThere's a sting in the tail at the moment, which is revealed on your support page, which says that "If you view a document in which a colleague has inserted a comment using the modern comments feature, you won't be able to see it in the older version." That means that anyone who is not using modern comments, will not be able to see comments inserted by those who are.
I work on technical standards, where we have contributors and reviewers from many different companies, who will be using different versions of Office on MacOS and Windows, depending on their individual corporate policies. This sounds like a recipe for disaster, where we will lose multiple comments. Although I like what I've seen so far, I need a way to revert to classic comments if my colleagues who haven't yet got access to modern comments are going to be able to see what I'm doing. So far I can't see how to do that.
I also echo MoMaier's comment that this wastes a lot of space, particularly if you're using a vertical orientation screen.
