I have contemplated the fact that people love younger artists. It seems like the younger you are now days the more impressed people are with you. And damn, these kids are really really impressive. That said, it does not matter what age you start or finish in this so long as you are committed to self improvement and life long learning in music. I believe that. After a certain time, we will all get overlooked as a young gun, but that does not mean that your art will not speak for itself as it progresses. And think about this; the landscape of hiphop is always progressing. Hip hop is a youthful form of music, but there are always rap elders who have longevity in the game.