User blog comment:Rogaine/UPDATE OF IMPORTANCE: Where is the chat?/@comment-23174019-20140425132753/@comment-1404252-20140425193411

They were several issues with both chats. One issue that both suffered from was due to lag, which often meant that some messages would be displayed minutes after being sent, which defeats the purpose of instant messaging. While the mibbit chat is still susceptible to lag, from my experience it has not been close to the scale of the wiki and forum chats. Other issues include the fact that opening the wiki chat opens up a new window, although this issue could be remedied fairly easily. The forum chat was also very small and if trying to read through earlier messages, you would be sent straight back to the most recent if another was made--a problem prominent with the sometimes fast-paced chat.

Onto your second point, I'm not at all fussed with the look of the chat. I'll admit that I do prefer the look of the wiki chat, but it makes little difference to me. Perhaps more frequent use will alleviate the issues you have with it? :P As for your slow computer, I would assume that having to load a new window when opening the chat wouldn't be much less hassle than having to edit a talk page.