Dream may be a perfect case into the pro's and cons of debuting so young. One hand your career has more longevity and you get a head start on your colleagues who have to think about enlistment much sooner but on the other hand, 9 years in, you're still young but your identity now feels ... stale? 

What routes can they take to mature in a way that feels fresh and doesn't feel like they're trying to recapture the sounds of their previous releases. Is SM playing it too safe? (Yes).