The real question I have is: why posting a mean question without making a slightest effort to answer it yourself? Did you read the article? Did you try the prod

The real question I have is: why posting a mean question without making a slightest effort to answer it yourself? Did you read the article? Did you try the product yourself (or all of the competitors you've mentioned)? I, for one, believe that collaborative editing should have been added to every authoring application, not just editors, 10 years ago. I still use shared screen sessions for that.