I don't think they'll ever support real time save. Doesn't bother me at all though...I wouldn't use it.
I don't think I can remember any games without some sort of save system on NDS anyway.
Real time saving would be helpful in a game like Zelda Phantom Hourglass when your halfway through a dungeon and need to save as you have something more important to do, while the standard save means you have to start from the start of dungeon which can get really frustrating and slightly put you off the game.