User blog comment:Rappy 4187/Technical Update: April 19, 2017/@comment-5973717-20170420050844/@comment-25295528-20170420115151

Why would you want chat embedded into the page? It makes things more complicated, also makes it more difficult to customise. A separate tab/window also gives you a bigger space, like, I don't know why you'd want it embedded into one page, especially given most people edit on the wiki while on chat. Separate tabs is pretty useful (I don't open in separate tab usually as it's default size is a little weird for me).