We GenX were also the last to be allowed a childhood. I grew up with hours and days of adult-free time to roam, w/ and w/o my peers.
Conversely, my kids gen were the first to grow up fully imprisoned. Every minute was spent in adult-populated, adult-curated boxes. If they defied the lie-based hysteria about kidnapping risk and went outside, there was nowhere to go. In every direction are roads and trespassing risks.
As near as I can tell, this growth-killing hell is a permanent fixture of childhood. With most joy placed beyond reach of kids and parenting time up 20-fold, our modern declining birth rate is the natural, reasonable response.