Rather than just browse the articles, comments, etc., chat would offer this site another means of communication between members on various subjects and I think it might facilitate responses to some issues that arise with OS X problems, but ultimately, the decision should depend on the relative difficulty, usage and cost. I don't think you need a very large number of chatting members at a site of this nature to justify having chat available, but that's only one man's opinion who isn't paying your bills. <g>
MacRichie