In any evidence-based discussion of "the kids these days" I think the elephant in the room is the mental health crisis - they have the highest rates of depression, anxiety, loneliness and suicide, they may be the most stressed out and unhappy generation ever.
Are they any more or less stressed than kids who grew up during the great depression or during the world wars? Or is that we just have better tools for data collection and analysis, and a better culture around being open about mental health issues?