Youth has all the time, energy, and enthusiasm, and generally less resources to put them to good use. With age comes accumulated (hopefully) income and experience, but less time and energy to properly utilize those things.

My advice, not that you asked, while you are still young, have a complete fun time, travel, and get all the "stuff" you want, even if it means taking on some debt. You can "work it off" as you work your way through life.