About the only assumptions I'm going to make are these....
Those of us with "Boomer" parents had parents that largely lived in a time where dual incomes were just starting to take off. The rampant rise in housing, daycare, and vehicle costs hadn't fully taken effect. And our parents didn't have the college education mantra beaten into our head from a young age or a degree as a requirement for many non-trades oriented professions. They had pension plans offered by employers and health care plans and costs that were much lower. Wages in comparision to living costs for them were higher.
All of the inflation(living costs, house prices, education requirments, ect) just keeps growing for each generation. I truly feel sorry for a lot of kids that have graduated over the last couple years. They got dealt a shit deck of cards.
As a parent and someone who actually understands the burden that a lot of these new grads face vs what I did, or my parents did, or my grandparents did I'm not going to take the hard line approach of "18 and out". It's just not setting up my kids for a better life down the road.
I will encourage if not outright force them to get a job in high school to pay for their gadgets and spending cash. And try to instill a proper work ethic in them. And I will try what I can to reinforce the value of good grades & scholarships. And I will try to steer them towards more value oriented education (state schools vs private), encourage a sound career path, and pay for what I can to keep them out of college debt.
And when they are done with school, I'd still be fine with them living under my roof for a year or two and knock down student debt or pay off a reasonably priced vehicle and get money saved up to truely live on their own and not get into a cycle of debt and monthly payments like so many people do.
Kids graduating from school right now do not have the same cost of living and purchasing power that their parents did at a similar age. Trying to apply the same principals as their parents did is not a fair comparison.