-eats less resoucres on computer
-unrelated to evil microsoft
-easily find people from utopia you don't have contact info for (ie. WTH is Syele? try /whois Syele or this monarch waving me is called Syele... do a /query Syele no need to ask for my info just talk to me. )
-entire KD idles together so you can tell them things all at once without messing with invites
-you get dced from chat you don't have to find someone to invite you back in
-no annoying graphics and "Buzz" thingies
-Highlighter if you want to be buzzed
-IRC bots !!

How many people in a few Irc chat rooms can you round up at a single momment when you need to do some major damage with the least effort?
6-9 from my own KD depending on the time of day...with notice, all of them. If I needed help on a larger scale I can find many many more.

How can you envite every single person you met in Utopia from the ages of recruiting for alliances and grass feed? Imagine all the people that told me to shove HaJ up my ying-yang when I was incharge of the entire department. Imagine all the friends I made in the process. :)
Well I never message all people on my MSN at once.. but if I wanted to message everyone on any IRC channel I go to at once, I can any time I like. That is alot of people too as I use 25 channels. MSN still doesn't have message offline that I know of.. IRC has Memos. or ahve a bot tell them you are looking for them ;)

Tell me how iRC is better then MSN when your secluded to your 1 and only chat room family with occasional people who say "hi", just because they know a few other people you know.
I dont feel at all secluded. Who says its a one and only chat room?