Well I hope they actually work on a client for OS X
.
I think it would survive, and I'm sure they won't go away from their current 2D graphics, not by a long shot. They might however apply some sort of 3D mods to it, not the kind most people are thinking of though, the kind that's for 3D monitors and stuff, and they will up the resolution and stuff on the game as well, make it more crisp.
Also I think one day Nexon isn't going to be running MS anymore, they will probably sell the game or contract it or something to another company, or at least work together on it, partly because they can't run it by themselves forever and they might kill it accidentally one day, and partly because it makes them so much money, they will never give their baby up completely.
I just think it's gotten really bloated these days, they need to hold back on some things and improve everything else, it's gotten really really bad...They copy KMS remember, and as long as that is successful and alive so will GMS, unless you were talking about MS as a whole, globally, then I think it's never going to die. Best bet though is if KMS was to die,
every other server would follow, one by one.