New Look on "Grown-Ups"

Who is to say at what point someone may be considered "grown up"? Is living at home through college living at home too much? People will say that kids shouldn't return home after going away to college in order to grow up, but why? Kids are moving back home after college more and more these days, but they aren't kids anymore. In Lev Grossman's essay "Grow Up? Not So Fast", he claims that you cannot be grown up until you achieve economic and social independence. He cites such attributes such as living at home, taking longer to graduate, waiting longer to get married, and moving from job-to-job as evidence suggesting that the newer generations are taking longer to grow up. Grossman accuses young adults of being immature and irresponsible when in reality they are just the opposite.
Living at home saves something that is in short supply these days: money. It isn't costing parents anymore to use space they already have and it gives new adults a chance to work and save money in order to successfully move out on their own later. Taking longer to graduate is necessary in order to get a better education in such a competitive job market. Waiting to get married only enables people to make better decisions about who they marry so as not to make the mistake so many of their parents made. Job hopping is only a quest to be content in a career. So why is Lev Grossman so upset by what he sees as an inability to grow up? Possibly because when he was a young adult, the social norms were different. People left home to tough it out on their own, get married and have kids (only to divorce a few years later). Sounds something like jealousy.
Society, just like everything else, goes through an evolutionary cycle. In today's society it is acceptable to take longer to "grow up" because it makes it easier to live a fulfilling life. It doesn't appear to be hurting anyone besides Lev Grossman, so I say live it up, all you new adults. Take advantage of this chance to stock up now, because life is only going to get tougher. Good luck.