hehehe
Ultima online is still online since 1998
they have updated Client 2D to 3D client and people are playing right now.
Think a thing they have spent a lot of money in this game do you really think they will want you to go away?? NO they will make up something to keep you billing as much as they can. They'll update all updateable <--- LOL
Im sure SquareEnix wont give up its MMRPG part and will release updates or new online games.