There is some of that when it comes to doing missions (not xp though), which I think some people forget. Level caps used to be a great way to tell when something is doable in a group. CoP you can be a contributing member to the early missions as low as 30. Unfortunately, it seems people don't want the challenge anymore (I wouldn't do it at 30 again, 35+ and I'll go), they just get told to level to 99 and steamroll the old stuff. Or not to do it all since its not the best gear rewards.