As far as having children goes, I think it’s more than an economic effect. We also just have a change in personal goals, supported by a change in social expectation.
Choosing to start families at a later stage or just plain choosing not to at all, is sometimes a personal choice independently of economic pressures.
It should be noted that the article title is actually “Fewer young people are meeting these 5 milestones typically associated with adulthood”, and even it’s first sentence acknowledge these milestones as a mix of economic and family milestones - “Fewer young adults are achieving economic and family milestones typically associated with adulthood…”
Last I looked, we weren’t running out of humans, so the drop-off in breeding is mostly a capitalist concern, or a bigoted concern that the wrong humans are breeding.
Not when it’s Buffy. It fit right in.