I gotta say, it's incredible how these procedures and surgeries happen these days.
I had my appendix out at age eight. I'd had an attack one evening, the family doctor made a house call and determined that's what the problem was, and they checked me into the hospital the next day. I guess the surgery was the following day, but I was in there for three or four days after. One thing that delayed my getting out was that I'd popped a stitch trying to climb the walls during recovery from the anesthetic. They didn't catch why the incision kept bleeding. Finally they did and wheeled me back up to the operating room to put a couple of staples in (I remember that, and screaming bloody murder), and a day or two later I went home. But even without that complication, it was normal to have a "hospital stay" for anything like that.
So now you can go in for a gall bladder, throw in an appendix, and still be at home eating and watching TV and posting later in the day.