People are taking on responsibilities later, but society is kind of forcing them to take them on later. Its a kind of forced coddling. I rarely see teenagers in jobs these days. When I was a teen, it was normal to get a job, and only privileged or lazy didn't get them. It even seems to be a thing that teens are avoiding getting drivers licenses in greater numbers.
https://news.nationalgeographic.com/news/energy/2013/12/1312...
This seems like a clear sign of decreased independence.
Instead of increasing the age of majority, we should be allowing and encouraging young people to take on responsibility earlier.