Why would we want people going to IRC when we have forums? Most of the time I search for answers to software support issues, I get forum posts. People go to Google for answers to everything. If we direct
them to a particular chat resource, then they might use it. Absent those directions from us, what IRC server would they go to and start trying #godhead at (yes, it's the obvious room name choice; I just didn't want to bother with looking up IRC ChanServ settings)? Going to freenode would be a random shot; Googling is a sure shot.
If people are used to some platform and some experience, it's human nature to resist change, even if the new can be proven superior to the old. Admittedly, the thing that counts is whether people do
change, because if they don't then it makes no difference if it will build you an island, then transforms into a jet and flies you there
if people insist on what they already know.
That's not to say the alternatives don't have problems, or that asking people to adapt isn't asking them to bear some new burden learning it. But we already produce vast amounts of text in IRC and here too without making it really count for anything. Once conclusions can be drawn, we don't really need to keep every word that was said. Doing a chat in a document and then staying in that document chopping down the cruft is a great way to summarize both as a way to help ongoing conversations and to get people who can't attend on the same page with our decisions ...just be reading the same page after we're done with it.