[quote name='Puppy']Some systems did I think-maybe all of them prior to the Playstation 1. I can't remember that far back.
Personally I really dislike it. Makes swapping discs more annoying for multi-disc games. Also causes the console to reset if it screws up reading a disc, etc.
Plus it allows you to open the console to stop the disc from spinning to prevent wear and tear if you're not going to be using it for awhile. I know when I first got my Playstation 1 I was really impressed that you could open the drive, close it, and it would resume right where it left off.[/quote]
As far as I can tell, the Wii does the same thing! My Wii remote died the other day during Red Steel, and it cut to a screen that said "The connection with your remote has been interrupted". I scrambled for some new batteries, and after having found them, also found that I needn't have scrambled - it picked up exactly where it stopped, as though I had paused it but without a pause screen.
The same thing happened last night whilst playing Super Mario Sunshine on the Wii - popped out the disc to put in a new one and it told me it needed the Super Mario disc. Remembering this thread, I knew that it was in GC mode and didn't want a Wii disc, so I tried one anyway to see what happened. Unsurprisingly, it told me this was not Mario Sunshine and asked for it again. I put it in, and voila! Picked up right where it left off when I ejected it.
I think this is a pretty great system, although I do wish that there was an easier way to get back in to Wii mode when playing GC games. It would be pretty rad if the Home button on the Wii remote worked while playing GC games, since you have to use the remote to choose the GC game when you start up the Wii. Oh well, turning it off isn't too much of a hassle - I'm already crouched in front of the Wii at that point anyway if I want to switch games.
EDIT: Also, I just put a GC disc in with the edge of the disc all the way to the edge of the slot, and the Wii auto-centered it and read it no problem. Sweet.