what is it about 20-something?

After reading the article,"What Is It About 20- Something?", I found that there are five milestones in our life: completing school, leaving home, becoming financially independent, marrying and having a child. However, I haven't achieve one of those five milestones. In today's century, it takes a long time for people to grow up and achieve the five milestones. According to the study,people who are 30 years old in 2001 had achieved the same number of milestones as the people who are 25 years old in the early 70s did.Besides that, there are many factors that affect people to grow up and achieve those milestones such as economic and family support.During the economic downturn period, people are trying to find a good paying job, and some people don't even know what jobs they would like to do. Moreover, in today's society, people who are already 20+ still can get money from their parents. Parents help them to pay bills and cook for them which leads young people to take a long time to grow up.