Much worse now. I know plenty of parents who are in their 60's and 70's who still have their kids living with them at 36+ years of age. Life it just too easy for some people these days.
No, life is not too easy. Young adulthood has been very difficult for the last 2 generations.
Older Millennials like myself graduated from school into the worst economic contraction since World War II in the late 2000s/early 2010s.
Generation Z has graduated into a pandemic induced recession and a white collar, inflationary recession (2023-present).
Since the 2000s, both Gen Y/Millennials and Gen Z have had it worse in their young adult years than the Baby Boomers or Generation X did.
Since the dot com recession of the early 2000s, it's been super common for young adults 18-34 to live at home for extended periods. I've observed this to be more of a young male problem than a young female problem. It's much more challenging to establish oneself as a young adult now with salaries not keeping pace with inflation, low earnings from being newer to the workforce, and high housing costs. For white collar workers, especially white collar male, there's the constant threat of layoffs.
In a better case scenario, the only time that an 18-22 year old spends at home with their parents are summer vacations when college isn't in session. That's still even a burden for a childless man dating a single mom of an 18-22 to deal with.
A child turning 18 doesn't diminish the parenting burden that much.
The headaches you'd receive about being a boyfriend or step whatever are so not worth it.
This is true. This is much worse for childless men.
Single dads are more accustomed to a lifestyle with children. When a single dad gets into an extended relationship with a single mom, they have the commonality of children from previous relationships. Even that situation is a headache.