Dms who insist that even at level 10 or higher. That players still act like first level noobs. If you think that were just casually going to walk into a room without looking for traps or expecting at least a attack by second or third level guess again. Experience has to count for something. As well common sense. If rooms 1-10 had traps then it's a pretty safe bet that 11-20 will also have traps.
As for items we still collect any kind of item. Yet at the same time I'm not going to fault a player for wanting a better item. I mean if I have a chance to get a top of the line sports car over what I have I'm going to take the better car. I might keep a +1 weapon in reserve but only one. At a certain level it simply loses it's coolness factor imo.